Mark J. Reed wrote:
Oh, wow. I was just asking about the spec; didn't know this stuff
already worked. Rakudos to the team! :)
Actually there's quite much that works in Rakudo, even if some corner
cases are missing or error messages might benefit from more verbosity.
Especially in the area of
Hi,
Little Walker wrote:
I've been looking around to see if there's been any discussion of
introducing functional programming-style pattern matching for method/
function dispatch. Could someone point me to any such discussions?
It's done multi dispatch in Perl 6, and you can find an
That's almost exactly the example from:
http://perlcabal.org/syn/S06.html#Unpacking_tree_node_parameters
1. I feel incredibly embarrassed to have missed this
2. This is awesome!
Which is pretty powerful, really.
Absolutely - I think you're referring to the 'type subset' stuff which
is great.
This is where Perl 6 is not the same as functional
languages, since it's got an imperative OO element as well.
True, there can be friction between the functional style and OO,
Does the unpacking participate in dispatch? If a Hash comes in as $t
with no 'left' key, will it fail to match?
On Tuesday, March 9, 2010, Little Walker en...@dircon.co.uk wrote:
Which is pretty powerful, really.
Absolutely - I think you're referring to the 'type subset' stuff which
is
Mark ():
Does the unpacking participate in dispatch? If a Hash comes in as $t
with no 'left' key, will it fail to match?
Yes.
$ perl6 -e 'sub foo(%h($left)) { say $left }; foo({ left = OH HAI })'
OH HAI
$ perl6 -e 'sub foo(%h($left)) {}; foo({ no = left key })'
Not enough positional
Oh, wow. I was just asking about the spec; didn't know this stuff
already worked. Rakudos to the team! :)
On Wed, Mar 10, 2010 at 9:18 AM, Carl Mäsak cma...@gmail.com wrote:
Mark ():
Does the unpacking participate in dispatch? If a Hash comes in as $t
with no 'left' key, will it fail to
I think the closest things we've got to pattern matching come from a
combination of multiple dispatch, where clauses and signature
unpacking. I don't know much about the latter, but a where clause can
discriminate multiple dispatch variants based on parameter values
rather than just the type, so
On Mon, Mar 08, 2010 at 12:45:44PM -0800, Little Walker wrote:
: Hi there,
:
: I've been looking around to see if there's been any discussion of
: introducing functional programming-style pattern matching for method/
: function dispatch. Could someone point me to any such discussions?
Why
Em Seg, 2010-03-08 às 12:45 -0800, Little Walker escreveu:
I've been looking around to see if there's been any discussion of
introducing functional programming-style pattern matching for method/
function dispatch. Could someone point me to any such discussions?
a Tree matching language is on
On Tue, 9 Mar 2010, Daniel Ruoso wrote:
Em Seg, 2010-03-08 às 12:45 -0800, Little Walker escreveu:
I've been looking around to see if there's been any discussion of
introducing functional programming-style pattern matching for method/
function dispatch. Could someone point me to any such
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