[Jscheme-devel] New Approach to primitives

[Timothy J. H. <tim...@ma...>]

I'm thinking about changing our approach to primitives.

I've written all of the primitives directly in javadot and the built-in 
JScheme
special forms (set!, macro, if , or, lambda, quote, begin.
See jscheme/prims.scm

You can try it out like this...

> tim% java -cp lib/jscheme.jar jscheme.REPL
>
>
> JScheme 7.0 5/25/04 http://jscheme.sourceforge.net
>
>
;;;First blow away the old environment ... and get left with just 
javadot and 7 special forms...
> > (.INTERACTION_ENVIRONMENT$ (Scheme.currentEvaluator) 
> (jsint.DynamicEnvironment.))
> jsint.DynamicEnvironment@c21ece
;; now load up the new prims
> > (Scheme.load "jscheme/prims.scm")
> #t
;; and run the Scheme Tests successfully
> > (load "jscheme/SchemeTests.scm")
>
>
> **************** Running jscheme/ScemeTests.scm ******************
> several warnings should appear below as certain error conditions are 
> tested
> this is to be expected and does not signal a problem with the tests
>
> ** WARNING: No such  instance  method "equalsFirst" in class jsint.Pair
> ** WARNING: No such  instance  method "equalsFirst" in class jsint.Pair
> ** WARNING: No such  static  method "hashCode0" in class jsint.Pair
> ** WARNING: No such  static  method "hashCode0" in class jsint.Pair
> Tests: 266 Failures: 0
>
> All tests have completed with any errors as shown above
> Try (run-tests #t) to see both failing and successful tests and their 
> results
> ********************* jscheme/SchemeTests.scm has completed 
> ***********************
>
> #t
> > (exit)
> [Timothy-Hickeys-Computer:~/Research/Software/jscheme] tim%

The performance seems fairly close to the current performance.

I've downloaded the gabriel benchmarks for scheme and will compare the
two versions. I'd like to replace the primitives.scm, Primitive.scm, 
and primproc.scm
in jsint, with jscheme/prims.scm. The idea would be to load 
jscheme/prims.scm
directly into an evaluator with the NULL_ENVIRONMENT.

The advantage of doing everything in Scheme is that we get to program 
in Scheme
instead of Java, and I don't think there will be much of a performance 
penalty.

---Tim---