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:
LIBCIO.pm6:
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, $mode);
# close the file
fclose($fp);
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,
-Tom
P.S. I plan to make a pull request adding some of this to the
language docs in "Modules" and "NativeCall" as more examples.
