Re: file name of java class generated by kawa

[Per Bothner <per at bothner dot com>]

On 09/17/2015 02:25 AM, Damien Mattei wrote:
> i put the example in a file named 2d-vector.scm
>
> and compiled it with the command :
>
> java -jar /usr/local/lib/kawa-2.0.jar -C 2d-vector.scm
>
> and i get those file as result ,files that seems ok for use with other
> classes but i'm surprised of the names that begin with $ character:
>
> $N2d$Mnvector.class
>
> is it a convention ? it's not really pretty ... is there a way to have
> just a 2d-vector.class file name?

This is an issue I agonize over. "2d-vector" is  valid class name for
the virtual machine, but it is not a valid *Java* class name.  Thus
if we created the class "2d-vector" there would be no way to reference
the class from Java code except by using reflection.

The question is which is more important:
(a) a clean translation from Scheme name to class name?
(b) being able to access the class from Java without reflection?

I don't know the right answer.  So I've stuck with the status quo,
inherited from Old Days when the restrictions on class names were stricter.

For an in-depth-disussion see:
https://blogs.oracle.com/jrose/entry/symbolic_freedom_in_the_vm

> what is the use of the other generated file:
>
> $N2d$Mnvector$frame.class

$frame classes are used for implementing closures, basically.
In the 2d-vector class it turns out it isn't really needed,
so generating it may be a bug, but there are other cases it s needed.

The "invoke" branch (in Subversion) of Kawa implements closures
differently (using MethodHandles on Java 7 or newer), and
that dos not create the $N2d$Mnvector$frame class.
--
	--Per Bothner
per@bothner.com   http://per.bothner.com/