Re: defmacro: Null pointer exceptions with compiled files

[Adam Warner <lists at consulting dot net dot nz>]

On Sun, 2004-05-30 at 15:25, Per Bothner wrote:
> Chris Dean wrote:
> 
> >>... I have put macros in individual files and compiled them as a
> >>separate compilations. The macros do not work if I load the compiled
> >>files instead of the .scm files.
> > 
> > 
> > Try using require instead.  load will not use the separate compilation
> > unit that you want.  Write if you want a more detailed example.

Thanks Chris. Per's comment helped me realise that I had to use kawa -C
instead of compile-file for require to (also not) work.

> True, I do recommend "Files compilation" [as the Kawa manual calls it] 
> and (require <module>), rather than "Archive compilation" and (load 
> "file"), as the former will integrate better with Java, and provide 
> better namespace management, and better optimization.

Good to know.

> However, I do want "Files compilation" to work more-or-less 
> transparently like other Lisp/Scheme systems that support compilation. 
> As far I can tell, your test case *should* work.

It also appears to be broken with Files compilation:

(module-name <incanddec>)
(module-export inc dec)

(defmacro inc (var)
  `(begin
     (set! ,var (+ ,var 1))
     ,var))

(defmacro dec (var)
  `(begin
     (set! ,var (- var 1))
     ,var))

$ kawa -C inc-and-dec.scm 
(compiling inc-and-dec.scm)
$ kawa
#|kawa:1|# (require <incanddec>)
#|kawa:2|# (let ((i 1)) (inc i))
<stdin>:2:14: evaluating syntax transformer 'inc' threw java.lang.NullPointerException

> Unfortunately, I have don't have time to debug this now.  Could you 
> enter it into the Kawa bugzilla, so we don't forget about it?

Will do. It's quite a showstopper.

Regards,
Adam