Re: type of arg 2 to scm_object_to_string ?

[Marius Vollmer]

Tano Fotang <address@hidden> writes:

> I did:
>
>     SCM my_result = scm_object_to_string(my_object, scm_display);
>
> and get the following compiler warning:
>
>     our_guile.c:228: warning: passing arg 2 of `scm_object_to_string'
> from incompatible pointer type

The second argument of scm_object_to_string is a SCM value, not a C
procedure.  You could do:

  display_proc = scm_variable_ref (scm_c_lookup ("display"));
  my_result = scm_object_to_string (my_object, display_proc);

Or you could use scm_simple_format:

  format_string = scm_from_locale_string ("~a");
  my_result = scm_simple_format (SCM_BOOL_F, format_string, my_object);

Both display_proc and format_string need only be computed once, of
course, but should be protected with scm_gc_protect_object when they
are stored in a global variable.

-- 
GPG: D5D4E405 - 2F9B BCCC 8527 692A 04E3  331E FAF8 226A D5D4 E405