Xotcl November 2003

xotcl@alice.wu.ac.at

8 participants
6 discussions

how to track a segmentation fault problem in Xotcl?
by Catherine Letondal 04 Jan '04

04 Jan '04

Hi, I have just re-installed Xotcl 1.0.2 version and succedeed in running my application with some minor changes since the last xotcl version I used on this platform (Sparc/Solaris 7) was the 0.9 :-) I have a segmentation fault that occurs when a command is called from a Tk menu. The command is attached to the popup by a: add command -command statement on a menu Tk widget that is raised by a tk_popup. However, the very same command, when called from the tcl (xowish) interpreter, works and does not produce any core dump. And most menu items also work well. So my question is: how do I debug such a situation? Thanks for any help... -- Catherine Letondal -- Pasteur Institute Computing Center

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XOTcl 1.1.0 publically available
by Gustaf Neumann 02 Dec '03

02 Dec '03

Dear XOTcl community, XOTcl 1.1.0 is now available from www.xotcl.org! Below is the full announcement text! best regards -gustaf neumann ======================================================================== Announcing XOTcl 1.1.0 ********************** WHAT IS XOTCL? XOTcl is an object-oriented extension of Tcl that was derived from OTcl. In short, XOTcl tries to provide a highly flexible, reflective, component-based, and object-oriented environment. It integrates language support for high level concepts which are not found in other languages, with reasonable performance. It prevails the Tcl programming style and the dynamic/introspective nature of the language, rather than introducing other language's styles and rigidness (such as C++) into Tcl. CHANGES relative to 1.0.2 are: - New functionality and improvements: * Transitive instmixins (thanks to a suggestion of Neophytos Demetriou): The new version supports a tree of mixins (mixins of mixins); when a mixin-class X has instmixins Y registered, and X is registered as instmixin for a class C, the mixin classes Y are applied to C as well. * Conditional mixins (thanks to a suggestion of Neophytos Demetriou): mixins and instmixins can have now guards similar to filters that define when they should be applied * New composition strategy for (filter- and mixin-)guards: when a guard is defined more than once for the same interceptor the most specific guard is used, the others are overridden. * Creation of sub-objects via parameter: XOTcl's parameter method supports now a switch named "-Class" which can be used to create and configure sub-objects (see tutorial for details) * New predefined method: __unknown This method is called, whenever XOTcl references a class, which is not defined yet (e.g.: Class C -superclass UNKNOWNCLASS) This method is used for Zoran's wonderful ttrace package (for aolserver and tcl-Threads) * Improved documentation: - extended tutorial (Meta-Classes, Tk, ...) - beautified tutorial (style files, distinction between literals and placeholders, ...) - fixed hundreds of typos * some speed improvements - fixes: * New build system: - per default no shells are built - new configure switches eg. --with-xotclsh, -with-actiweb --with-all * Fixes for https in connection with some versions of IE * Fixed a few issues with purify and mt (many thanks to Zoran!) * Fixes for proc-scoped variable in connections with mixins * Fixed passing of error codes from constructors * various small fixes and code cleanup - with newer versions of autoconf - various fixes for stubs - improved build under windows - starkit compliance (many thanks to MichaelL(a)frogware.com) For more details, please consult the ChangeLog MORE INFO General and more detailed information about XOTcl and its components can be found at http://www.xotcl.org Best regards, Gustaf Neumann Uwe Zdun -- Univ.Prof. Dr.Gustaf Neumann Abteilung für Wirtschaftsinformatik WU-Wien, Augasse 2-6, 1090 Wien

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xotcl 1.1.0, tcl/tk 8.4.4 and freebsd 4.9 are not happy with each other
by Marc Spitzer 01 Dec '03

01 Dec '03

Hello all, I am trying to build xotcl 1.1.0 with tk/tcl8.4.4 from the ports tree on a freebsd 4.9 box and it is not working. The problem os that tk/tcl on freebsd is setup such that you can have mutpile version of tcl on the box at the same time and this breaks the build process. Here is my configure line: ./configure --with-all --with-tcl=/usr/local/lib/tcl8.4/ --with-tk=/usr/local/lib/tk8.4 --with-tkinclude=/usr/local/include/tk8.4 here is the output from gmake: $ gmake cc -DUSE_TCL_STUBS -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DVERSION=\"1.1\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_UNISTD_H=1 -DCOMPILE_XOTCL_STUBS=1 -DTCL_SHLIB_EXT=\".so\" -I/usr/ports/lang/tcl84/work/tcl8.4.4/generic -I/usr/ports/lang/tcl84/work/tcl8.4.4/unix -I"./../generic" -I"./../unix" -O -fPIC -g -DXOTCLVERSION=\"1.1\" -DXOTCLPATCHLEVEL=\".0\" -c `echo ../generic/xotcl.c` -o so/xotcl.o In file included from ../generic/xotcl.c:47: ../generic/xotclInt.h:15: tclInt.h: No such file or directory In file included from ../generic/xotclInt.h:16, from ../generic/xotcl.c:47: ../generic/xotcl.h:30: tcl.h: No such file or directory ../generic/xotcl.h:102: #error Tcl distribution is TOO OLD, we require at least tcl8.0 gmake: *** [so/xotcl.o] Error 1 $ Now the files that are "missing" are in /usr/local/include/tcl8.4: bogomips# cd ../tcl8.4 bogomips# ls generic tcl.h tclDecls.h tclPlatDecls.h unix bogomips# ls * tcl.h tclDecls.h tclPlatDecls.h generic: regcustom.h tclDecls.h tclMath.h regerrs.h tclIO.h tclPlatDecls.h regex.h tclInitScript.h tclPort.h regguts.h tclInt.h tclRegexp.h tcl.h tclIntDecls.h tclCompile.h tclIntPlatDecls.h unix: tclUnixPort.h tclUnixThrd.h so how hard would it be to add a --with-tclinclude ? Also I would need to do this for tclsh and wish(do I need to do wish?), on freebsd they are both shell scripts that tel you what you have installed not the real tclsh, like so: bogomips# tclsh In FreeBSD, tclsh is named with a version number. This is because different versions of tclsh are not compatible with each other and they can not all be called "tclsh"! You may need multiple versions installed because a given port may depend on a specific version. On your system, tclsh is installed under at least the following names: tclsh8.3 tclsh8.4 Thanks, marc

2 6

Linking object instance variables to a widget -textvariable?
by Ken Jones 21 Nov '03

21 Nov '03

Hi. I've just starting tinkering around with XOTcl the past few days, trying to add it to my repertoire of Tcl OO extensions. It's definitely quite an interesting contrast to others like [incr Tcl] or Snit. While I won't be abandoning either of those, XOTcl is currently my leading candidate for a project I'm likely to be working on through the rest of the year, in large part because of its mixin support. But one issue I couldn't figure out from my reading of the documentation or examples is whether it's possible to use an object's instance variable as a widget's -textvariable or -listvariable. For example, [incr Tcl] supports the [itcl::scope] command, so I can do something like this: package require Itcl ::itcl::class Toggle { private variable _state "normal" constructor {} { checkbutton .cb -text Enable \ -variable [::itcl::scope _state] \ -onvalue "normal" -offvalue "disabled" \ -command [::itcl::code $this toggle] .cb select ;# The checkbutton is initially on # ... } private method toggle {} { # ... } } Is there a similar feature for XOTcl? Thanks, - Ken Jones

5 6

Problem with automatic variable unsetting upon return from an instproc?
by Jim Russell 19 Nov '03

19 Nov '03

I've compiled XOTcl 1.0.2 with Tcl 8.4.4 to create a xotclsh. When I execute the script below, the traced variables are unset once too few times. Also, the order of the unsetting seems odd. Am I just confused, or I have discovered a problem? Here's the sample output: russell> xotclsh factorial.xotcl rhs = 3 rhs = 2 rhs = 1 tracecb "rhs" "" "unset" "2" tracecb "rhs" "" "unset" "3" tracecb "f" "" "unset" "::factorial-1" tracecb "f" "" "unset" "::factorial-0" 3! = 6 >>>> File factorial.xotcl <<<< proc tracecb { name1 name2 op } { upvar $name1 var puts "tracecb \"$name1\" \"$name2\" \"$op\" \"$var\"" } xotcl::Class factorial; factorial proc new { args } { eval my [ my autoname factorial- ] $args } factorial instproc compute { rhs } { puts "rhs = $rhs" if { $rhs > 1 } { set f [ factorial new ] ::trace add variable f [list unset] tracecb set lhs [ $f compute [ expr $rhs - 1 ] ] } else { set lhs 1 } set product [ expr $lhs * $rhs ] ::trace add variable rhs [ list unset ] tracecb return $product } proc main { value } { set f [ factorial new ] puts "${value}! = [ $f compute $value ]" } main [expr [ llength $argv ] ? [ lindex $argv 0 ] + 0 : 3 ]

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Classifier scoped data in XOTcl?
by Jim Russell 14 Nov '03

14 Nov '03

I may have overlooked it in the documentation, but I'm having trouble getting a classifier-scoped member variable in XOTcl. Is there a way to mimic the behavior of a C++ static data member?

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Xotcl November 2003