Xotcl

xotcl@alice.wu.ac.at

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653 discussions

Re: [Xotcl] problem with new
by Stefan Sobernig 04 Apr '09

04 Apr '09

Victor, > Date: Tue, 24 Mar 2009 19:40:43 -0700 > From: Victor Mayevski <vitick(a)gmail.com> > Subject: [Xotcl] problem with new > To: Xotcl(a)alice.wu-wien.ac.at > Message-ID: > <eef838c10903241940v7870fd4djfa8b56bd4f6ba8d0(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > In my code, when trying to create a new autonamed instance of one of > my classes, I get the following error: > > [ MyClass new ] > invalid command name "::xotcl" > > I don't even know where to start looking for the cause of this error > since "new" is a built-in method of XOTcl. This error only happens > with this particular code, other code works fine. Any > tips/suggestions? I never encountered this issue (or sth. apparently similar) in an isolated piece of XOTcl code. And it is hard to tell from the two liner as this is most certainly rooted in your application-leve code (e.g. your MyClass declaration). Can you provide access to your application's code or compile a minimal, yet complete test script which reproduces the issue? //stefan

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XOTcl packages
by Victor Mayevski 03 Apr '09

03 Apr '09

I really like that XOTcl is being included with ActiveState distribution, and even updates via teacup are working. But there is one issue - why is it that the rest of XOTcl packages (comm, serializer etc) are not being included? Thanks a lot

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problem with new
by Victor Mayevski 25 Mar '09

25 Mar '09

In my code, when trying to create a new autonamed instance of one of my classes, I get the following error: [ MyClass new ] invalid command name "::xotcl" I don't even know where to start looking for the cause of this error since "new" is a built-in method of XOTcl. This error only happens with this particular code, other code works fine. Any tips/suggestions? Thanks

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Announcement: XOTcl 1.6.3 available
by Gustaf Neumann 19 Mar '09

19 Mar '09

Dear XOTcl Community, I am pleased to announce the availablilty of XOTcl 1.6.3. The new version contains noticable speed improvements, especially, when compiled with Tcl 8.5 Best regards Gustaf Neumann ============================================== Announcing XOTcl 1.6.3 ************************* We are pleased to announce the availability of XOTcl 1.6.3 Major changes relative to 1.6.2 are: * Functional improvements: - simplified and generalized handling of namespaced instance variables, where namespaced associative arrays could conflict with global variables due to Tcl's default namespace resolution. Many thanks to Stefan Sobernig for this contribution! * Fixes: - Corrected deleted of meta-classes. It was possible to create undestroyable objects before via complex meta-classes structures * Speed improvements - Use of new interfaces in Tcl 8.5 (when compiled with Tcl 8.5) - simplified interfaces for various C functions - Speed improvement for method invocation benchmark: * In Tcl 8.5: 10-15 % * In Tcl 8.4: 5-10 % * Improve code quality - some more code cleanup - factoring out common code - using const in more cases * Extended regression tests * Improved documentation For more details about the changes, please consult the ChangeLog and documentation. MORE INFO General and more detailed information about XOTcl and its components can be found at http://www.xotcl.org

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Class unknown -> create is considered harmful
by Ben Thomasson 07 Jan '09

07 Jan '09

Hi XOTcl developers, I have been using XOTcl for a while and I have discovered that the default implementation of the Class unknown method is harmful to large scale development. The default implementation calls create from the unknown method. Here is an example that shows the problem: Class A A nstproc doX {} { puts done} A intsproc doY {} { puts done } The problem here is that misspellings of class methods will cause objects to be created instead of methods to be defined on the class. Here we will have an object named ::nstproc and one named ::intsproc which are both misspellings of instproc. There is a simple fix for this: Class proc unknown { args } { error "[ self ] Unknown command: \"$args\"" } Class instproc unknown { args } { error "[ self ] Unknown command: \"$args\"" } This will require classes and objects to be created explicitly with the create or new method. I find this preferable to having mistakes silently ignored. I have seen this problem in the wild as well as in my code. XOTclIDE had several misspellings that were ignored until I loaded with my fix. Of course existing XOTcl projects will have to be modified to insert create methods where needed. Ben Thomasson

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error whilst following tutorial
by Bernard Devlin 22 Dec '08

22 Dec '08

Hi, First of all I'm new to Tcl. I've been reading around it for the past 10 days or so, and I like it very much. I saw there were lots of OO implementations on top of it, which is kind of mind-blowing when one is used to languages that have 'the-one-true-way' to do OO. In the languages I've learned in the past quite often OO just seemed to get in the way. However, I've finally got to the point in my programming development where I'm feeling restricted by languages like Python and Java. Hence my delight at re-discovering Tcl for myself. When I did a quick survey of the OO implementations in Tcl, I was immediately drawn to OTcl, and then disappointed to see it hadn't been enhanced over the last decade. Until I discovered XOTcl :-) This seems to me to be the most power OO system I've looked at - as powerful as Smalltalk, only for me Tcl is a more amenable language. I'm using Artur's 0.83 image of XOTclIDE (which has XOTcl 1.6 bundled inside it). Of course, I'm really enjoying Artur's IDE. I finally feel like I've got the right combination of language and toolset to extend my programming ability. I am so grateful that XOTcl and the IDE have been made publicly available. However, following the main XOTcl tutorial ( http://media.wu-wien.ac.at/doc/tutorial.html) in the IDE, I've got a problem. After running 'do it' on each stage of the tutorial, when I get to this line: set fb [bayernMunich newPlayer -name "Franz Beckenbauer" \ -playerRole PLAYER] I get an error. Here's the stack trace: ::bayernMunich::__#WZ: unable to dispatch method 'name' during '::bayernMunich::__#WZ name' ::bayernMunich::__#WZ ::xotcl::Object->configure ::Player ::xotcl::Class->create ::Player ::xotcl::Class->new invoked from within "Player new -childof ::bayernMunich -name {Franz Beckenbauer} -playerRole PLAYER" ("eval" body line 1) invoked from within "eval Player new -childof [self] $args" (procedure "newPlayer" line 5) ::bayernMunich ::SoccerTeam->newPlayer invoked from within "bayernMunich newPlayer -name "Franz Beckenbauer" \ -playerRole PLAYER" (in namespace eval "::" script line 1) invoked from within "namespace eval :: $string" (procedure "evalString" line 3) ::IDE::System->evalString invoked from within "IDE::System evalString $string" (procedure "evalString" line 3) ::xotcl::__#HM::@editor ::IDE::Editor->evalString invoked from within "my evalString $sel" (procedure "evalSelection" line 5) ::xotcl::__#HM::@editor ::IDE::Editor->evalSelection invoked from within "::xotcl::__#HM::@editor evalSelection" invoked from within ".workspace1.#workspace1#mb.#workspace1#mb#menu8 invoke active" ("uplevel" body line 1) invoked from within "uplevel #0 [list $w invoke active]" (procedure "tk::MenuInvoke" line 50) invoked from within "tk::MenuInvoke .workspace1.#workspace1#mb.#workspace1#mb#menu8 1" (command bound to event) I'm not sure if this is because XOTcl has changed since the tutorial was written, or if it is because I'm just running through the tutorial in the workspace. Regards, Bernard

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counted as garbage collection for java2tcl
by Mykhaylo Sorochan 17 Dec '08

17 Dec '08

Hello, I'm going to use counted (http://wiki.tcl.tk/3137) in java2tcl (http://wiki.tcl.tk/22102) as a garbage collection solution. I will appreciate any feedback about issues/problems on counted usage with XOTcl. -- Regards, Mykhaylo Sorochan

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Java to XOTcl translator
by Gustaf Neumann 15 Dec '08

15 Dec '08

Dear XOTcl community, some of you might be intersted in the Java to XOTcl source code translator by Mykhaylo Sorochan. It is a very new development looking quite promising. http://macroexpand.org/doku.php/txl:projects:java2tcl:start best regards Gustaf Neumann

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Announcement: XOTcl 1.6.2 available
by Gustaf Neumann 03 Nov '08

03 Nov '08

Dear XOTcl Community, XOTcl 1.6.2 is available. See below for more details. Best regards -gustaf neumann Announcing XOTcl 1.6.2 ************************* We are pleased to announce the availability of XOTcl 1.6.2 Major changes relative to 1.6.1 are: * Functional extensions: - handle nonposargs in method "copy" properly - new command ::xotcl::finalize (for forcing cleanup and destuctor execution at a time in a multi-threaded environment, where it is still safe to execute all tcl commands) * Extended and generalized "info" method - Added "<class> mixinof -closure ?pattern?" Query the objects for which <class> is used as a per-object-mixin (directly or indirectly) * Fixes for potential crashes - Implemented proper downgrading of Classes to Objects (handle cases, where something was created first as an object and is reclassed/recreated later as a class) and vice versa - Reset mixin order for per-object mixins, when the superclass of a class is deleted, which is used as per-object mixin * Improved documentation * Extended regression tests * Some code cleanup For more details about the changes, please consult the ChangeLog and documentation. MORE INFO General and more detailed information about XOTcl and its components can be found at http://www.xotcl.org

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Announcement: XOTcl 1.6.0 available
by Gustaf Neumann 25 Jun '08

25 Jun '08

Dear XOTcl Community, XOTcl 1.6.1 is available. This release provides in short: - improved orthogonality for introspection, - improvements in the serializer - some minor fixes Starting with XOTcl 1.6.0, release packages for XOTcl are available for Debian GNU/Linux. XOTcl is included in upcoming Ubuntu releases, starting with Ubuntu 8.10 "Interpid Ibex" (see also: http://media.wu-wien.ac.at/download.html). Many thanks to Stefan Sobernig for his help! See below for more details concerning the release Best regards -gustaf neumann Announcing XOTcl 1.6.1 ************************* We are pleased to announce the availability of XOTcl 1.6.1 Major changes relative to 1.6.0 are: * Extended and generalized "info" method * Generalized serializing package: when deserializing code, now consistenly no constructors are called. In previous versions, constuctors were called on slots; due to the point above, this is not needed; background: the previous solution had problems in aolserver ns_eval, when a slot-constructor called db-functions, since during ns_eval, the database handles are non-functional) * Fixes for potential crashes when methods were called with invalid arguments * Improved documentation * Extended regression tests For more details about the changes, please consult the ChangeLog and documentation. MORE INFO General and more detailed information about XOTcl and its components can be found at http://www.xotcl.org

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