This mail announces the the pre-4.0 release.
Why is is not called 4.0? Good question :-)
This version would have been numbered 4.0 if there was not a so long
time between this release and the previous one. Since I take so long
to release, I had time to add a lot of things to my "TODO list".
And this version misses some things that I consider important (even if
not visible from outside) to be called 4.0. Furthermore, there is a big
absent since last release which is the port on Windows. The real 4.0
will have support for Windows.
Here are the main visible changes from previous release:
About Scheme
* A module system has been added
* Integration of the Bigloo MATCH-CASE and MATCH-LAMBDA
primitives. Furthermore, the file bigloo.stk provide
some compatibility between STk and bigloo modules.
* A simple FFI has been added. It allows to access C
functions without writing C code (works only on a
limited set of architectures for now).
* integrates the R5RS VALUES and CALL-WITH-VALUES
* multi-line comments have been added.
* The "-file" interpreter option is no more necessary
* Display of the prompt and of the eval result in the
REPL are now user definable.
* report-error mechanism has been enhanced a lot (work
is not completely achieved).
* new-primitives: append!, mast-pair, C-string->string,
remove-file, rename-file, temporary-file-name, ...
* Numerous bug corrections
* ...
About Tk
* Integration of the Tk8.0 toolkit
* The old inspector has been adapted to work with
current release (not completely, but sufficiently
while the new version is terminated)
* Buttons, Checkbuttons and Radiobuttons can use a
:variable and :textvariable in a given environment.
This environment is given with the new :environment
option.
* New metaclass: <Tk-composite-toplevel>. This is
identical to the class <Tk-composite-widget>, except
that the widhet lives in its own toplevel window.
* make-image simplifies the usage of Tk images and uses
a cache, to speed-up access to already used images.
* The little square window, which used to appear as soon
as STk was launched, appears now only when the first
widget is mapped on screen.
* ...
About STklos
* The MOP of STklos is now very similar to the CLOS one.
Here are some of the new features:
o when a slot does not exists, the gf slot-missing
is called
o when a unbound slot is read, the gf slot-unbound
is called
o new generic functions slot-ref-using-class,
slot-set-using-class, slot-bound-using-class?,
slot-exists-using-class?, slot-definition-name,
slot-definition-options,
slot-definition-allocation,
slot-definition-getter, slot-definition-setter,
slot-definition-accessor, generic-function-name,
generic-function-methods,
method-generic-function, method-specializers
method-procedure, remove-method
change-object-class
* New kind of slot allocation: "active". An active slot
is a slot for which you can put a daemon before or
after its reading/writing
* Standard behavior of class slots is now identical to
CLOS: when a class-slot is inherited, it is shared
with instances of the superclass. If it is redefined,
a new slot is created
* slot initializers are evaluated in the lexical
environment of the class definition.
* (Tk-)virtual slots can now have an :initform option.
* Generic functions can be now traced with the standard
TRACE function.
* Composite widgets have now a class slots which
contains the class of the object. This slot is
initialized by default to "Composite", but it can be
overloaded for a particular class. For instance
labeled entries use the value "LabeledEntry" by
default. This feature can be used for initializing the
X11 resource database. for instance you can have
STk*LabeledEntry*Entry*Background: white in your
.Xdefaults file to set the default value of background
of the entry of a <Labeled-entry> widget.
* New composites widgets: Gauge, Valued-Gauge,
Balloon-help
* The HTML-browser has been enhanced to access now the
web (i.e. you can grab distant texts or images). The
Web browser admit now applets written in Scheme.
* New kind of slot allocation: "active". An active slot
is a slot for which you can put a daemon before or
after its reading/writing
* extended types (defined in C) are now automatically
integrated in the STklos hierarchy.
* Several new classes for displaying messages boxes
* New class <Color-box> for choosing colors.
* New <Tk-Text-inset>. This class is the now the parent
class of <Text-window> and of (the new) class
<Text-image>.
* ...
Received on Fri Apr 10 1998 - 16:15:15 CEST
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