Re: [Geiser-users] Macro stepper?

[Dmitry Pavlov]

Hello Jose,

Thank you for your answer.

> > I tried to select the entire buffer and perform Geiser's
> > "macroexpand region", but it does not work, saying:
> >
> >    Error: retort-syntax
> >
> >    UNKNOWN::19310: read: #lang not enabled in the current context
>
> Try selecting the lines _after_ this line.  You can also try with
> individual definitions first to see if they work (you'll need to compile
> the file first (C-c C-k) so that Racket knows about it).  The macro
> expansions should take place in the context of your #lang, modulo bugs.

Still does not work...
I have the following code

#lang mylang
X := Y.

which expands into the following (I checked in DrRacket):

(module test mylang/language
  (#%module-begin (assign X Y)))

and compiles  well, thanks to the macro in language.rkt:

(define-syntax-rule (assign name value)
  (printf "DBG: assigning ~v := ~v\n" 'name 'value))


As the same time, when I select the "X := Y." line in Emacs
and run "Geiser->Macroexpand->Region" on it (having already
compiled the whole file), I am getting the following

  Error: struct:exn:fail:syntax

  compile: bad syntax; function application is not allowed,
  because no #%app syntax transformer is bound in:
  (#<procedure:macroexpand> (quote (begin X := Y.)) #f)


> But you'll have to be patient, submit patches or both

OK, for now I will go with being patient :)


Best regards,

Dmitry