Lobbying Smalltalk...
Andrew C. Greenberg
werdna at gate.net
Thu Sep 30 10:20:30 UTC 1999
>..or:
> Winning Ignorance
>
>Excuse me,
> I'd like to talk about a small idea: creating a Squeak VM for Java
>Using the CCodeGenerator engine, I think would be not so difficult to
>generate a JavaCodeGenerator class for building java source code for the
>VM.
>We will have Squeak running in a JavaVM, perhaps a bit slowly.
>After a bit of working, we can try to integrate the java GC, JavaBeans
>and the Security concepts of Java into Squeak, generating a hybrid VM
>and the Smalltalk of the future.
>
>A lot of java-students will look with interest to a Java-based
>implementation of Smalltalk, and start to download the SqueakVM....
>
>This is only an idea. I know the efficency problem 'd be not so tiny and
>so I am only talking about it....
>..someone interested?
Assuming that the CCodeGenerator generated Java Object rather than C,
the net effect would be a bytecode interpreter for a dynamic language
with garbage collection running a bytecode interpreter for a dynamic
language with garbage collection. This can be expected to crawl --
for an example of what it would be like, run the Squeak inside Squeak
interpreter simulator.
A similar, but far more successful task was JPython, an
implementation of Python in Java. In that case, however, far more
than a mere port of the preexisting bytecode generator was
accomplished -- this was a complete rewrite which itself exploited
the JPython object and memory model. I considered doing a parallel
task, but it was not obvious how to avoid some of the deeper
differences between the systems.
Earlier messages in this listServ announced the result of a working
Smalltalk in Python. You may want to see what they have done to date
before undertaking the task yourself.
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