Xotcl April 2002

xotcl@alice.wu.ac.at

5 participants
4 discussions

results of the poll
by Gustaf Neumann 22 Apr '02

22 Apr '02

Dear XOTcl community, the results of the poll can be summarized as follows: - most people favored "names" instead of "symbols" for "selfDispatch" - the hottest favorite is "my". One can write now ... my instvar a b c my log ... instead of ... [self] instvar a b c [self] log ... the variant with [self] will continue to work forever.. If someone is not happy with "my", please react soon. From the "volatile" front: we have now more-or-less Zoran suggestion implemented in C. Actually there is no need in general for using tcl-variables to implement volatile objects (we could handle this on a pop of stack frames), but at least for pure tcl-procs, var traces are the simplest implementation. The current implementation (purely in C) works as part of the "new" method: a) Object new ... b) Object new -childof ... c) Object new -volatile ... d) Object new -volatile -childof ... (a) creates "global" objects, not in the global namespace anymore, but in xotcl. (b) can be used to create objects as child of other objects (e.g. [self], the objects are deleted, when the specified object is deleted), (c) are "global" objects as in (a), but they are deleted, when the current tcl-proc/object-proc/instproc is left, and (d) is a combination of b and c. Needless to say, a-d works for classes as well as e.g. Class new -volatile in order to create "anonymoes" classes. The implementation of new is slightly faster than before, since i changed the nameing schema to be the same for all kind new ("__#122", ...), such that e.g. [Class new -volatile] new -volatile works as well. the disadvantage is that the neat classname derived names as in earlier versions have to be done by hand now... that was it for now best regrads -gustaf

4 8

Resume Writing and Distribution
by Adam Erickson 15 Apr '02

15 Apr '02

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XotclIDE Version 0.30
by Artur Trzewik 14 Apr '02

14 Apr '02

Hallo! The Integrated/Interactive Development Environment for XOTcl The new version of XOTclIDE 0.30 is ready on http://www.xdobry.de/xotclide The Changes from last annouced Version 0.24 - support for tcl procs (importing, genarating, managing). That let you mix old tcl code with xotcl code in one xotclIDE project. There are some reason still to write some tcl procs. - unit tests cover almoust whole application. - show of versions trees (components, classes, methods) - better import function - component save wizard (flexible source generation). Let you save componets: in many or one files, with or without metadata. - many small improvements (same bags was removed) - improvements in GUI - support of MS Window platform (zip file) have fun Artur Trzewik

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XOTcl 0.9.4 available
by Gustaf Neumann 09 Apr '02

09 Apr '02

Dear XOTcl community, here comes the announcement of XOTcl 0.9.4. This is supposed to be the last patch release before XOTcl 1.0. We fixed a lot of problems in this patch release, so we hope that the migration to 1.0 will be smooth... best regards -gustaf neumann ======================================================================= Announcing XOTcl 0.9.4 ********************** 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 0.9.3 are: - fixes: * separate reference counting for XOTcl objects and classes to avoid references from tcl_obj's internal representation to freed memory * fixes for AOL-Server (many thanks to Zoran Vasiljevic for that and for his great help during fixing the problems above) * improved portability: horrible macro substitution bug, when USE_ALLOCA or USE_MALLOC was specified; these are used for some platforms such as AIX * fixing path search for XOTcl library (bug was introduced in 0.9.3 in connection with TEA compliance) * fixed a bug in copy/move (many thanks for Artur Trzewik for reporting this) in connection with constructors (constructors are not called automatically in copy/move operations anymore) * various small fixes in libraries (e.g. HTTP support, generation of pkgIndex-files, using "my", ...) - enhancements: * new global command "my": one can use now: Class Counter -parameter {{n 0}} Counter instproc ++ {} { my incr n } Counter instproc print {} { puts "actual value: [my n]"} Counter c1 c1 ++ c1 print In earlier versions it was neccessary to use "[self]" instead of "my". This change reduces the number of special characters in XOTcl programs. "[self]" will continue to be supported by XOTcl. * extended semantics of "new" a) Object new ... b) Object new -childof ... c) Object new -volatile ... d) Object new -volatile -childof ... where (a) creates now "global" objects not in the global namespace anymore, but in the ::xotcl namespace, (b) can be used to create objects as child of other objects (e.g. as children of the actual object [self]; the objects are deleted, when the specified object is deleted). (c) creates are "global" objects as in (a), but they are deleted, when the scope of the current tcl-proc/object-proc/instproc is left and (d) is a combination of (b) and (c). - optimizations: * XOTcl is trying to keep Tcl_Objs of type tclCmdNameType instead of converting it to XOTclObjectType agressively. * A patch for Tcl 8.4a3 is available from the XOTcl web site for performance hungry applications to provide special byte-code-support for xotcl, that yields for classical benchmark programs up to 40%. This patch is not likely to be integrated into the general Tcl core in the new or distant future. 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

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Xotcl April 2002