Re: landed r7rs support

[Amirouche Boubekki]

Le lun. 18 nov. 2019 à 12:43, Mikael Djurfeldt <address@hidden> a écrit :
>
> On Sun, Nov 17, 2019 at 3:45 PM Andy Wingo <address@hidden> wrote:
>>
>> Hey all :)
>>
>> The library syntax for R7RS is a subset of R6RS, so to use R7RS you just
>> (import (scheme base)) and off you go.  As with R6RS also, there are
>> some small lexical incompatibilities regarding hex escapes; see "R7RS
>> Incompatibilities" in the manual.  Also there is a --r7rs command-line
>> option.

I do not think the library syntax for R7RS is a _subset_ of R6RS.  For
one, it rely
on `define-library` instead of `library`.

For anyone trying to write (and benchmark!) code across scheme implementations,
you will have some luck with -x options:

  -x EXTENSION   add EXTENSION to the front of the load extensions

You can call guile with:

  guile -x .guille.scm ...

And use .guile.scm as an extension for guile specific files.

Also, in R6RS library form, the form `import` is not defined that is
you can not do:

(library (mylib)
  (export myfunc)
  (import (scheme base)) ...)

ref: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=38760