|Perl: the Markov chain saw|
Re^2: Concurrency in Perl 6by raiph (Hermit)
|on Nov 06, 2013 at 17:10 UTC||Need Help??|
AFAIK there's no XS with perl 6, so just *how* does one extend perl6 ?
The highest level sugar of all for extending P6 with code from other langs starts with a use some::module:from<otherlang> statement. For example that's how you call Java code.
I mean, if I find a really cool C library whose functionality I want to wrap, precisely how do I go about doing that ?
In an ideal world you'd use the above sugar. In the real world things aren't quite that simple (a long discussion about this today on #perl6).
Fortunately there's a really nice lower level interface called NativeCall (codename Zavolaj) so you use that instead.
Is the procedure well laid out in the perl 6 documentation ?
NB Right now you need to use Rakudo/Parrot to use NativeCall. (The final fixes for it on Rakudo/JVM are expected this month. My guess is that it'll be another few months before Rakudo/MoarVM catches up.)
Also note that some of the doc is ahead of implementation, some of it behind.
Is it a big learning curve ?
For a 60 second intro, see this short example.
I particularly like the way NativeCall supports use of P6's is repr trait to overlay P6 objects and C structs. This combines high performance (the same memory is used by both langs for fast and memory efficient execution) with coding convenience -- you just write ordinary object oriented Perl 6 code to read/write from/to a C Struct!
»ö« . o O ( "the celebrity tell-all of the Perl-6 cult?" )