On Sun, Apr 3, 2016 at 1:26 PM, Timo Paulssen <t...@wakelift.de> wrote:
> When you have a sub that's not "our", it will not show up in the
> module's namespace. Since you export the sub, it'll be available without
> LIBCIO:: before its name.
> I suggest you pass Str (the String type object) instead of 'libc' for
> the native trait, as the symbol is pretty much guaranteed to already be
> loaded in the program.

Okay, then, with that help this works:

  unit module LIBCIO;
  use NativeCall;
  our sub fopen(Str, Str) returns Pointer is native(Str) is export(:fopen) { * }
  our sub fclose(Pointer) is native(Str) is export(:fclose) { * }

I then successfully (so far) use them in a Perl 6 sub:

  # try NativeCall
  use lib '.';
  use LIBCIO :fopen, :fclose;
  # get a file pointer
  my Str $mode = 'r';
  my $fp = LIBCIO::fopen($ifil, $mode);
  # close the file

I don't see any example of any easier syntax in the "use LIBCIO" or
"our sub fopen..." lines, but I thought one could do something like:

  use LIBCIO <fopen fclose>;

If so, how are those subs then declared in LIBCIO?

Thanks, Timo.

Best regards,


P.S.  I plan to make a pull request adding some of this to the
language docs in "Modules" and "NativeCall" as more examples.

Reply via email to