RE: Guile truly embedable ?

[John Fitzgerald]

Deploying Guile on MS-Windows is problematical (see previous postings), but
I shall give it a try when I get back to my Linux machine.  

However, I would have thought that where '(use-modules ...)' is used as I
have done, the symbol would have been defined in the top level environment
and that both 'gh_lookup()' and '(defined? ...)' would also be operating in
that environment.  Your change log comment seems to imply this is not so.

I have included below a test case so you can see exactly what I'm doing and
because it may be easier for you to test at the moment than me.

> -----Original Message-----
> From: Marius Vollmer [SMTP:address@hidden
> Sent: May 08, 2001 06:16
> To:   John Fitzgerald
> Cc:   'address@hidden'
> Subject:      Re: Guile truly embedable ?
> 
> John Fitzgerald <address@hidden> writes:
> 
> > But beware that gh_lookup() returns SCM_UNDEFINED for symbols defined
> with
> > 'define-public' in modules included via 'use-modules', whereas
> > gh_eval_str("(defined? ...)") *will* find them, at least in Guile 1.4.
> 
> Believed fixed.  Can you check it?
> 
> 2001-05-07  Marius Vollmer  <address@hidden>
> 
>       * gh_data.c (gh_lookup): Call gh_module_lookup with
>       `scm_current_module ()', not `#f'.
>       (gh_module_lookup): Expect a module instead of an obarray as first
>       argument and do lookup in that module.
> 
        
----------------------------------------------------------------------------
----------------------------------------------------------------------------
------------
        FILE: foo.scm

        (define-module (foo))

        (define-public (baz) "M41")

        
----------------------------------------------------------------------------
----------------------------------------------------------------------------
------------
        FILE: bar.scm

        (use-modules (foo))

        
----------------------------------------------------------------------------
----------------------------------------------------------------------------
------------
        FILE: test.c

        #include <stdio.h>
        #include <guile/gh.h>

        void main_prog (int argc, char** argv) {
            int bound, defined;
            printf("\n");

            /* File 'bar.scm' uses 'foo.scm' which defines 'baz'. */
            if (gh_scm2bool(gh_eval_file("bar.scm"))) {
                printf("\tFile 'bar.scm' loaded successfully.\n");

                /* Check what gh_lookup() says. */
                bound = !SCM_UNBNDP(gh_lookup("baz"));
                if (bound)
                    printf("\tSCM_UNBNDP(gh_lookup(\"baz\")) says
bound.\n");
                else
                    printf("\tSCM_UNBNDP(gh_lookup(\"baz\")) says
unbound.\n");

                /* Check what (defined? ...) says. */
                defined = gh_scm2bool(gh_eval_str("(defined? 'baz)"));
                if (defined)
                    printf("\t(defined? 'baz) says defined.\n");
                else
                    printf("\t(defined? 'baz) says undefined.\n");

                /* Report on their agreement. */
                if (bound == defined)
                    printf("\tgh_lookup() and (defined? ...) agree.
PASSED.\n");
                else
                    printf("\tgh_lookup() and (defined? ...) disagree.
FAILED.\n");
            } else {
                printf("\tCould not load file 'bar.scm'.\n");
            }
            printf("\n");
        }

        int main (int argc, char** argv) {
            gh_enter(argc, argv, main_prog);
            return 0;
        }



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