Xotcl

xotcl@alice.wu.ac.at

2 participants
653 discussions

different xotcl distribution in activetcl ?
by Luc Rasson 20 Aug '07

20 Aug '07

Hi, I've noticed that the xotcl distribution in activetcl differs from the one provided on the xotcl site (let say xotcl-1.5.3.tar.gz) So, for example, the "library" directory is missing ... And, if you try something like "package require xotcl::store::persistence " (as you can see in the http://media.wu-wien.ac.at/doc/library/store/persistenceExample.xotcl example) that doesn't work (file missing) ... that's a real gap because as OO programmers we all know how persistence is closely related to the OO world (and not only). I've asked why to the activetcl team but they say they just build the xotcl distribution you gave to them. Maybe you provided to them a specific Makefile, or maybe is this one corrupt/incomplete ? So my question is what appened, and obviously what can I do to integrate the full ("official" ?) xotcl distribution to my existing activetcl installation ? (runs on windows) ? Thanks, LR --------------------------------- Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase.

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XOTcl 1.5.4 in FreeBSD and WinTclTk
by Martin Matuska 16 Aug '07

16 Aug '07

XOTcl ver. 1.5.4 is now available in: a) FreeBSD ports tree (packages will be built in the next days) http://www.freebsd.org/cgi/cvsweb.cgi/ports/lang/xotcl/ b) WinTclTk distribution for Microsoft Windows, version 0.5.2 http://wintcltk.sourceforge.net A single-file wrapped tkcon.exe that includes XOTcl 1.5.4 can be downloaded from: http://wintcltk.sourceforge.net/tkwrap.html

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XOTcl 1.5.4 available
by Gustaf Neumann 14 Aug '07

14 Aug '07

Announcing XOTcl 1.5.4 ************************* We are pleased to announce the availability of XOTcl 1.5.4. Originally, this release was planned as a small bug fix release. However, the total size of the (unified) diff between 1.5.3 and 1.5.4 is more than 5000 lines, mostly due to the varRefom changes (see first item below). Major changes relative to 1.5.4 are: * Improved code quality: + provided compatibility with Tcl 8.5 (currently, this requires the verison of Tcl 8.5 from CVS head, including the changes for VarReform (For details, see http://groups.google.at/group/comp.lang.tcl/browse_frm/thread/bff391a7f1bd8…) + improved serializer (handling var traces for instances variables) + several small bug-fixes (e.g. fixing empty variable names, error message propagation for configure, fixing potential crashes, when namespaces are added to objects during <object> eval, etc.) + improved portablility for more platforms (more portable shell tests for e.g. FreeBSD) + extended regression test 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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two crashy issues // 1.5.x
by Stefan Sobernig 24 Jul '07

24 Jul '07

I attached two scripts, each reproducing bugs I found with most recent versions of XOTcl (1.5.2/1.5.3). Bug -1-: Argument declarations to proc/instproc containing a single empty tcl string yield a segfault/bus error. Bug -2-: Nesting objects through per-object evals (evals in the object scope) yields segfaults/bus errors under certain conditions. all the best, //stefan -- Stefan Sobernig Institute of Information Systems and New Media Vienna University of Economics Augasse 2-6 A - 1090 Vienna `- +43 - 1 - 31336 - 4878 [phone] `- +43 - 1 - 31336 - 746 [fax] `- stefan.sobernig(a)wu-wien.ac.at <mailto:stefan.sobernig@wu-wien.ac.at> `- ss(a)thinkersfoot.net <mailto:ss@thinkersfoot.net> package req XOTcl # / / / / / / / / / / / / / / / / / / / / / # Bug trace -1- # empty tcl string as argument declaration # - - - # stefan.sobernig(a)wu-wien.ac.at # reproducable/observed for 1.5.2/1.5.3 ::xotcl::Object o o proc m1 {{}} {;} # / / / / / / / / / / / / / / / / / / / / / # Bug trace -2- # Nesting through "objscoped" evals # - - - - - - - - - - - - - - - - - - - - - # stefan.sobernig(a)wu-wien.ac.at # reproduceable/observe for 1.5.2/1.5.3 package req XOTcl namespace import ::xotcl::* Object o o eval {set x [::xotcl::self]} o set x o eval {set x [::xotcl::self]::nested} o set x set cmd {::xotcl::Object [::xotcl::self]::nested} o eval $cmd # yields bus error # - - - # However, strange enough, when uncommenting lines 12-14 # the nested object is created without any # fatal error?! Object o # o eval {set x [::xotcl::self]} # o set x # o eval {set x [::xotcl::self]::nested} # o set x set cmd {::xotcl::Object [::xotcl::self]::nested} o eval $cmd # works as expected # - - - # Injecting a requireNamespace makes # the issue vanish, even with the # pre-nesting operations being # evaluated Object o o eval {set x [::xotcl::self]} o set x o eval {set x [::xotcl::self]::nested} o set x o requireNamespace set cmd {::xotcl::Object [::xotcl::self]::nested} o eval $cmd # works as expected # - - -

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Pre-release of xotcl 1.5.4
by Gustaf Neumann 23 Jul '07

23 Jul '07

Hi everybody, due to the reported problems, we provide a pre-release of xotcl 1.5.4. http://media.wu-wien.ac.at/download/xotcl-1.5.4.tar.gz Below is a list of the changes in this trunk since the release of xotcl 1.5.3. Ben, please check, if this solves your problem. Artur's case seems more complicated, i don't see the relation to the event loops in the fixes below. -gustaf neumann 2007-07-23 <Gustaf.Neumann(a)wu-wien.ac.at> * Pre-Release of XOTcl 1.5.4 2007-07-23: <Gustaf.Neumann(a)wu-wien.ac.at> * fixed a bug with empty argument names (Many thanks for Stefan Sobernig for reporting the bug) 2007-07-03: <Gustaf.Neumann(a)wu-wien.ac.at> * allow to call methods from the class to be called from slot objects (Many thanks for Nico L'INSALATA for noting this problem). 2007-06-05: <Gustaf.Neumann(a)wu-wien.ac.at> * Fixed spelling mistakes in the tutorial (Many thanks to Robert Hicks for reporting) 2007-05-27: <Gustaf.Neumann(a)wu-wien.ac.at> * Fixed potential error with default values for parameters starting with a "-". (Many thanks to Shishir Ramam for reporting) 2007-03-16: <Gustaf.Neumann(a)wu-wien.ac.at> * fixed a bug where a Tcl call adds a namespace to an object, but xotcl did not notice it. (Many thanks for Stefan Sobernig for reporting the bug) 2007-01-14: <Gustaf.Neumann(a)wu-wien.ac.at> * fixing error message propagation for methods called via configure. (Many thanks for Kristoffer Lawson for reporting the bug) 2006-12-12 <Gustaf.Neumann(a)wu-wien.ac.at> * changing "test == " to "test =" as required by FreeBSD (many thanks to Martin Matuska for providing the patch) 2006-12-07 <Gustaf.Neumann(a)wu-wien.ac.at> * MinGW patches (many thanks to Martin Matuska for providing the patch)

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segmentation faults and bus errors
by Ben Thomasson 23 Jul '07

23 Jul '07

Hello again, I bring bad news. I am receiving seg faults and bus errors while running XOTcl code. I am running XOTcl 1.5.3 and Tcl 8.4 on both Linux x86 and OS X PPC. I received the errors randomly on both platforms. This started occuring when I reloaded the source code. At first I thought it was related to Tcl packaging, but I mostly removed calls to package require and package forget. Currently I just use source to load most files. I am writing code generation libraries and using Object eval so I may be doing new things with XOTcl. How should I go about debugging these seg faults? Are core dumps useful? I'll try to write a script that reproduces the problem, but I haven't really narrowed the problem down yet. Any help is much appreciated. Thanks, Ben

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Re: [Xotcl] parameters vs slots and use of "-initcmd"
by mail＠xdobry.de 05 Jul '07

05 Jul '07

>Strictly speaking, an application programmer does not have >to use parameter in the application program, therefore Artur is right. > >While the application program does not have to *define* slots, >it is hard to do something useful in xotcl without *using* slots >since methods like "superclass", "class", "mixin" etc. >are implemented as slots. > Thanks for precise explanations. I must confess that till now I have not consciously (bewußt) used slots. It is indeed very powerful construct and I have noticed that is used to implement of many of XOTcl features. One reason, why I do not use slots and complex parameters is that XOTclIDE has no support for it. I has not programmed it yet. I have no idea how to define or visualize slots in XOTclIDE in this way, that it suits to general concept. Now XOTclIDE has already a problem with versioning of class definition (creation body). Because definition bodies are not versioned like bodies of methods. Using slots is even more complex. Tutorial example: Class create A -slots { Attribute foo -default 1 -proc assign {domain var value} { if {$value < 0 || $value > 99} { error "$value is not in the range of 0 .. 99" } $domain set $var $value } } Normally XOTclIDE let you view, change and redefine all items separately. But in this example complex items like method-body are part of class creation. Is there a way to define such slots in iterative way. I have tried following code but it was not OK. Class A Attribute A::slot::foo this one seems to work A slots { Attribute foo } A::slots::foo proc assign {...} { .... } I miss also possibility to obtain slot definition per introspection. (similar to ::A info parameter) Probably one the only one way is own code (::A::slot::foo info body assign). Anyway! Probably one of possible usage of slots will be implementing MVC GUI Framework. Complex parameters could be used to connection GUI Code with Domain Code. Similar approach I know from Smalltalk VisualWorks Framework see also: http://www.martinfowler.com/eaaDev/uiArchs.html It use so called Attributes, which are objects and represent a simple value (like Integer, String, Date). UI-Controls can be connected to this attributes (per event framework). These attributes are members of domain objects. I have a question to another XOTcl users. I am not sure how urgent and important is the support of slots definition in XOTclIDE. So any information about it are welcome. Artur

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parameters vs slots and use of "-initcmd"
by Nico L'INSALATA (UniPI) 04 Jul '07

04 Jul '07

Hi everybody, my name is Nico and I'm new to XOTcl. After spending few weeks in understanding the basic concepts of the language, I decided to use it to model one component of the software I'm developing as part of my PhD project (basically, configuration of complex digital hardware macrocells). I've been attracted by XOTcl due to its "aspect oriented" features which are today very common in the hardware design industry. I need some clarifications regarding the use of Class parameters and Class slots (I will refer to v.1.5.2 of the XOTcl tutorial). Parameters are used throughout the introduction of the tutorial to model Class attributes, then slots are introduced in a later section. Are slots and parameters actually the same thing? Is there some reason to prefer one over the other? Anyway, I've started using slots and I got lost using the -initcmd feature. This is a "simplified" version of the code that "doesn't work" (i.e. I'm not able to make it work :-) ) Class my_class \ -slots { Attribute one -type integer -default { 0 } Attribute two -type integer -default { 0 } Attribute three -type integer -initcmd { if { [my one] > [my two]} { set _ 100 } else { set _ 101010 } } } The code doesn't work (of course!!) since [self] within initcmd has value "::my_class::slot::three". So, the question is: how do I refer to other attributes of the same class from within -initcmd { }? And secondarily, is it possible to associate -initcmd with an instproc of the class in which the attribute is being defined? e.g. an instproc of Class my_class Note that, to ensure things work properly, when instances of my_class are created both attributes "one" and "two" are initialized, while attribute "three" will also be refereed in a subsequent part of the script. This behavior is bizarre and potentially unsafe, but is dictated by another software components over which I have no control. Thank you very much for your attention! Nico

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WinTclTk
by Martin Matuska 13 Jun '07

13 Jun '07

XOTcl is included in the Windows distribution *WinTclTk*. It includes XOTcl-related packages: * XOTcl v1.5.3 * xotclexpat * xotclgdbm * xotclsdbm * additional XOTcl libraries (e.g. xml, storage, etc.) * XOTclIDE The distribution is available under the following URL: http://wintcltk.sourceforge.net A single-file wrapper with XOTcl support is available, too, see URL: http://wintcltk.sourceforge.net/tkwrap.html

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xotcl1.5.3 installation on WinXP
by vijay_n 13 Jun '07

13 Jun '07

Hi, Thanks for informative manual on XOTCL. On trying to install xotcl1.5.3 on windows XP, I am getting following message: Copying directory: xml/TclExpat-1.1 Indexing the packages ... resulting message: couldn't load library "C:\PROGRA~1\Tcl\lib\xotcl1.5.3\x otcl\..\..\libxotcl1.5.3.dll": this library or a dependent library could not be found in library path while executing "load C:/PROGRA~1/Tcl/lib/xotcl1.5.3/xotcl/../../libxotcl1.5.3.dll XOTcl" ("package ifneeded" script) invoked from within "package require XOTcl" (file "C:/xotcl-1.5.3/./library/lib/make.xotcl" line 7) Plese note that using REAMDE provided for installation and having tclsh83. Complete logs are as follows: C:\>cd xotcl-1.5.3 C:\xotcl-1.5.3>cd win C:\xotcl-1.5.3\win>ls 'ls' is not recognized as an internal or external command, operable program or batch file. C:\xotcl-1.5.3\win>dir Volume in drive C has no label. Volume Serial Number is 5471-FCF7 Directory of C:\xotcl-1.5.3\win 03/20/2007 05:26 PM <DIR> . 03/20/2007 05:26 PM <DIR> .. 09/13/2006 05:35 PM 3,225 configs.vc 05/24/2004 04:20 AM 1,077 dllBase.txt 05/24/2004 04:20 AM 1,284 dllEntryPoint.c 03/21/2007 11:12 AM 3,671 installWin.tcl 09/13/2005 03:11 PM 12,154 Makefile.vc 05/24/2004 04:20 AM 97 pkgIndex.win 05/24/2004 04:20 AM 109 pkgIndex.win.in 03/20/2007 04:22 PM <DIR> rc 03/20/2007 05:26 PM <DIR> Release 05/24/2004 04:20 AM 10,751 winMain.c 8 File(s) 32,368 bytes 4 Dir(s) 21,155,819,520 bytes free C:\xotcl-1.5.3\win>tclsh83 installWin.tcl Installing to Directory: /Progra~1/Tcl XOTcl Version is 1.5.3 Copying xotcl.h Copying xotclInt.h Copying xotclDecls.h Copying xotclIntDecls.h Creating XOTcl Lib Dir Creating pkgindex files for xotcl in the library directory Copying directory: actiweb Copying directory: comm Copying directory: lib Copying directory: patterns Copying directory: rdf Copying directory: registry Copying directory: serialize Copying directory: store Copying directory: store/XOTclGdbm Copying directory: store/XOTclSdbm Copying directory: xml Copying directory: xml/TclExpat-1.1 Indexing the packages ... resulting message: couldn't load library "C:\PROGRA~1\Tcl\lib\xotcl1.5.3\x otcl\..\..\libxotcl1.5.3.dll": this library or a dependent library could not be found in library path while executing "load C:/PROGRA~1/Tcl/lib/xotcl1.5.3/xotcl/../../libxotcl1.5.3.dll XOTcl" ("package ifneeded" script) invoked from within "package require XOTcl" (file "C:/xotcl-1.5.3/./library/lib/make.xotcl" line 7) *************************************************** INSTALLATION COMPLETE. In order to use XOTcl set PATH to '/Progra~1/Tcl/bin' and set TCLLIBPATH to '/Progra~1/Tcl/lib/xotcl1.5.3' *************************************************** C:\xotcl-1.5.3\win> C:\xotcl-1.5.3\win> C:\xotcl-1.5.3\win>tclsh83 % % % % % package require XOTcl; namespace import -force xotcl::* couldn't load library "C:\PROGRA~1\Tcl\lib\xotcl1.5.3\xotcl\..\..\libxotcl1.5.3. dll": this library or a dependent library could not be found in library path % Requesting your help in resolving the above issue. Thanks in Advance. Regards, Vijay

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