[ANN] Traits beta2.1 stable kernel
Adrian Lienhard
adi at netstyle.ch
Thu Mar 10 14:15:55 UTC 2005
Hi all,
This release of Traits on SqueakMap is supposed to serve as a first
demo for people who want to try out Traits and have a look at the
implementation. It also includes the implementation of the class
Complex as a simple example of using Traits.
Please see the version comment below for more information.
Adrian
Traits Release beta2.1 for Squeak3.7
====================
In this version the new language kernel featuring Traits is
refactored/bootstrapped. We consider the kernel being complete and
stable (gamma).
Features concerning the user interface, especially the code browser,
that are crucial for getting the real "traits experience" are in work
and are not contained in this release. To be able to already use Traits
there is a basic traits browser which is based on OmniBrowser (World
menu->open->Traits Browser).
This release now also contains a very simple example of Traits: the
implementation of Complex which was refactored to share a trait with
the class Number to avoid code duplication.
Please find more information and papers about Traits at:
http://www.iam.unibe.ch/~scg/Research/Traits
Installation
------------
The implementation is available as a SAR file on SqueakMap. It is
tested in a new fresh 3.7 image. Prerequisite package is Monticello.
Please note, that the installation takes about 30 Minutes (depending on
the speed of your machine) because it needs to recompile all the
classes in the image. (This is a consequence of the fact that we had to
change the format of the kernel classes.)
Getting Started
---------------
Open the Traits OmniBrowser: World Menu -> open -> Traits Browser
Create a new trait: Open the context menu in the class/trait pane and
select "create trait..."
UI Limitations of this release
-----------
- There are still many features missing that are absolutely essential
for getting the real "traits experience", but these are mainly related
to the UI and IDE. For example:
- There are no virtual categories that present the conflicts and glue
methods of a composite class/trait.
- There is no automatic computation of requirements
- There is no information that shows which traits/classes provide or
require the currently selected methods
- There is no support for turning classes into trait
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