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Re: Guile and MS-Windows on Major Govt. Project...

From: Ken Anderson
Subject: Re: Guile and MS-Windows on Major Govt. Project...
Date: Wed, 03 Jul 2002 09:27:33 -0400

At 08:47 AM 7/3/2002, Chris Bitmead wrote:

Yeah, ok well they should be considered. But jscheme is an interpreter within an interpreter == unnecessarily slow. None of them technically are Scheme (no

I think you'll find the performance of modern Java's, such as 1.3 or 1.4 very acceptable. When using Jscheme to do Swing GUI's you don't notice any performance difference because Jscheme is just assembling Swing components and Java is doing most of the work.

call/cc, blurry picture on full tail calls etc). Kawa's type system makes it rather inconvenient to use Java libraries like Swing (strings in kawa are not strings in java etc). Neither have built in a nice CLOS-ish object system which makes life worth living.

Let me put it this way: Is Full-Scheme-Language+CLOS+portable convenient gui on Windows+Linux too much to ask?

SISC is a full scheme. It shouldn't be hard to add a Scheme Swing library like Jscheme's JLIB.

Jscheme has chosen to stay close to Java, so integrating Scheme and Java is fairly painless. It does handle tail recursion. While it does not have a CLOS object system, it has multimethods and you can define Java classes in Scheme.

To do a CLOS in a Scheme built on top of Java you need to decide how the CLOS and Java objects interact. For example, in Jython, Jython classes look to Java like java classes. However, there semantics are slightly different which can get confusing. I'll have to think about how one might do CLOS in java some more.

Ken Anderson wrote:

At 10:41 AM 7/2/2002, Chris Bitmead wrote:

Hmm, just checked out PLT-Scheme. The Gui is so limited it doesn't even have something like a grid or table widget. And for this app it's very visual I need a pretty good set of widgets, including some kind of grid. And the OO system looks more awful to me the longer I look at it, but I guess I could live with it if the gui was ok.

Is there any scheme out there with some decent cross-platform gui support, and works on at least Windows and Unix, preferably Mac too? Am I asking so much?

Not at all. There are several Schemes implemented in Java that should let you do portable gui development easily. Here are 3:

I use Jscheme.

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