> On Sep 1, 2017, at 1:45 PM, Stefan Israelsson Tampe <stefan.ita...@gmail.com>
> wrote:
>
> Hi,
>
> I am maintaining a prolog->scheme compiler and a python->scheme compiler. The
> nice thing with those implementation is that they work well with the guile
> module system and are proper scheme functions and variables etc. So python
> objects can be treated as goops objects and prolog predicates can be used in
> kanren etc.
>
> There is a headake though. When loading a module from one language to another
> language the autocompilation fails. It would be nice to load a python module
> and work with it from scheme land and vice versa.
>
> One problem is the following funciton in system base compile
>
> (define* (compile-file file #:key
> (output-file #f)
> (from (current-language))
> (to 'bytecode)
> (env (default-environment from))
> (opts '())
> (canonicalization 'relative))
> ...)
>
> form is either specified or current-language and what I propose is to add a
> knob that enables another version of the default for from e.g. something like
> the following.
>
> (define %extension-map '((("py" "python") python) ((("pl" "prolog") prolog)
> (("scm") scheme)))
> (define %use-extension-map #f)
> (define (default-from-file file)
> (define default (current-language))
> (if %use-extension-map
> (let* ((ext (get-extension file))
> (lang (find-language ext %extension-map)))
> (if lang lang default))))
>
> (define* (compile-file file #:key
> (output-file #f)
> (from (default-from file))
> (to 'bytecode)
> (env (default-environment from))
> (opts '())
> (canonicalization 'relative))
>
> ...)
>
> I think that we already have variables that discovers the source files that
> guile can compile and I don't think that we should get name clashes as long
> as we use the prefix (languge prolog module) as a prefix for modules in other
> languages than scheme.
>
> WDYT
Will this handle all possible option processing?
Another option is to change compile.scm to hand-off unknown extensions to
another script using some convension.
For example, for py files, compile.scm would call out compile-py.scm, and for
prolog, compile-pl.scm.
