Re: state and = vs :=

On 10/2/2014 16:03, Elizabeth Mattijsen wrote: On 01 Oct 2014, at 07:48, Father Chrysostomos wrote: Does ‘state’ govern ‘:=’ the way it governs ‘=’? In other words, just as this: state $x = 1; only assigns to $x once (per closure), does the same apply to this? state $x := $y; I can

Re: Unexpected expansion of string with xx

On 12/19/2013 3:47, Richard Hainsworth wrote: Initially I though the following was a bug, but now I'm not sure. I got these results perl6 -v This is perl6 version 2013.09 built on parrot 5.5.0 revision 0 $ perl6 > say '0' xx 4 0 0 0 0 Are you sure you didn't want the x (string repetition) opera

Rakudo Star 2012.10 released

On behalf of the Rakudo and Perl 6 development teams, I'm happy to announce the October 2012 release of "Rakudo Star", a useful and usable distribution of Perl 6. The tarball for the October 2012 release is available from . A Windows .MSI version of Rakudo

Re: Implementations until Perl 6.0.0 released?

On 27/11/2010 18:37, Jonathan Worthington wrote: On 26/11/2010 17:17, gvim wrote: I'm new to the Perl 6 lists so can someone tell me if the "implementations" of Perl 6 will eventually transition to a Perl 6.0.0 standard or will TIMTOWTDI apply to the language itself inde

Re: Implementations until Perl 6.0.0 released?

On 26/11/2010 17:17, gvim wrote: I'm new to the Perl 6 lists so can someone tell me if the "implementations" of Perl 6 will eventually transition to a Perl 6.0.0 standard or will TIMTOWTDI apply to the language itself indefinitely? The implementations are aiming towards passing a common test s

Packed arrays and assignment vs binding

Hi, Per S09, we can write in Perl 6: my int @x; And the idea is that we get a packed array - conceptually, a single lump of memory allocated and and storing a bunch of ints contiguously. Contrast this to: my Int @x; Where we get an array of scalar containers, each of which is only allowed

Re: [perl6/specs] 58fe2d: [S12] spec setting and getting values of attribute...

On 30/09/2010 10:49, Damian Conway wrote: As long as C<.perl> works the way it does, there can be no real privacy. Sigh. That is indeed badly broken. Surely it ought to default to C, and require class architects to override .perl explicitly if they wish to break encapsulation. I see/use .perl

Re: not using get/set (was Re: [perl6/specs] 4d77c0: ...)

On 30/09/2010 21:38, Darren Duncan wrote: Mark J. Reed wrote: Of alternatives you didn't mention, I like "put" - as pithy as "get" and "set", with plenty of corresponding history (SmallTalk, POSIX, HTTP,...). Actually, *yes*. I didn't think of this one at the time but when you mentioned the

Re: Buf.pm: FIFO and grammar

Nicholas Clark wrote: On Thu, Aug 12, 2010 at 03:38:31PM +0200, Carl Mäsak wrote: In fact, jnthn++ had a talk at YAPC::EU the other week where he showed how nested signatures can be used to make hierarchical matches. A proof-of-concept module could simply be some sugar around this already ex

Re: Smart match isn't on Bool

Darren Duncan wrote: TSa (Thomas Sandlaß) wrote: ... unless you want C to do a value-and-type check, in which case it doesn't exactly follow the pattern for smartmatching of the other builtin types (which only check value equivalence, not type equivalence). This is true only if you want to dis

Re: Array membership test?

Mark J. Reed wrote: Possibly a FAQ, but is there a simple way of asking if an item is contained in an array? I know of $x ~~ any(@array) and @array.grep({ $_ ~~ $x}), but those both seem a bit complicated for a conceptually simple test, so I'm wondering if I'm missing something. Note that grep d

Re: S06 -- grammatical categories and macros

Aaron Sherman wrote: See below for the S06 section I'm referring to. I'm wondering how we should be reading the description of user-defined operators. For example, "sub infix:<(c)>" doesn't describe the precedence level of this new op, so how is it parsed? Is there a default? The default is

Re: underscore in numbers

Aaron Sherman wrote: The spec says, and NQP seems to implement (Rakudo, I think, picks up from NQP as defined in HLL-s0.pir, is this right?) that a single underscore is ignored between any two digits in a number, not between the radix and the number. However, it seems to me that this would be ve

Re: expression of seconds (was Re: A new era for Temporal)

Darren Duncan wrote: Dave Rolsky wrote: On a smaller point, I think second vs whole_second is the wrong Huffman coding. I'd think most people want the integer value. Well, whatever you call things, the most important thing is to keep the seconds count as a single number which can do fractions

Re: Type system for Perl 6

Giuseppe Castagna wrote: On 02/05/2010 11:29 PM, Jonathan Worthington wrote: And the odering in dispatch is not a type lattice as in Cecil but a topological ordering. Again I've no clue what that means. and all objects that do A are also B doers. So one could infer that we have A <

Re: Type system for Perl 6

Giuseppe Castagna wrote: Yes I saw that inheritance is not subtyping. I would not share this decision since as an outsider, it seems to me that Perl6 has redundant syntax (too many different ways to express the same thing), so it is astonishing that in that case the choice was to use the same k

Re: Type system for Perl 6

Hi, TSa (Thomas Sandlaß) wrote: There is no formally defined subtype relation or rules for subsumption. A type is called narrower without details what that means. A is a subtype of B if A ~~ B, where ~~ is the smart-match operator..It's up to the type object on the RHS how it responds to this.

Re: [perl #71536] [BUG] Rakudo allows two multi variants with the exact same signature to be defined

On 22/12/2009 10:22, Moritz Lenz wrote: Carl MXXsak (via RT) wrote: This be Rakudo 8dc189. $ perl6 -e 'multi sub f($a) {}; multi sub f($a) {}; f(42)' Ambiguous dispatch to multi 'f'. Ambiguous candidates had signatures: :(Any $a) :(Any $a) The definition of two variants with equivalent sig

Re: unusual invocants

Ovid wrote: I was asking the special case where: 1. A class consumes two (or more) roles 2. Each roles provides a method with an identical signature 3. The methods are not equivalent and neither role can rely on the other's method With that, you have roles which cannot be composed. You must

Re: Overloading Roles

Jon Lang wrote: Concerning that last one: would it be reasonable to have a Discrete role that provides a .succ method, and then overload the Range role? E.g.: role Range[Ordered ::T] { ... } role Range[Ordered Discrete ::T] { ... method iterator ( -> RangeIterator ) { .

Re: time complexity of searching elements in hash tables in Perl

Nicholas Clark wrote: My understanding is that this makes Perl 5 hash tables amortised O(1). Hopefully someone else will answer the Perl 6 side properly. My understanding is that the point of a hash table data structure was that lookups are amortised O(1). However, doing it right - and cert

Re: Testing Perl 6 analog to Perl 5's tie.

Aaron Sherman wrote: On Sun, Aug 2, 2009 at 1:10 PM, Moritz Lenz wrote: Let's pick up this old mail before it gets completely warnocked ;-) For the record, this discussion only applies to scalar implementation types. For example for Arrays I expect things to work by overriding the method p

Roles discussion

Hi all, It's been interesting to participate in the roles discussion so far, and I'm happy to see there's a lot of interest in getting the right options and the right defaults. I'm leaving tomorrow morning on vacation, and will be mostly offline for a week or so (the alps are quite a distract

Re: YAPC::EU and Perl 6 Roles

Hi, Going back to the original question... Ovid wrote: It needs the timed fuse() from a Bomb role and a non-lethal explode() from a Spouse role, though each role provides both methods. I'm curious... 1) How often do you in real life find yourself needing to do things like this in real life?

Re: YAPC::EU and Perl 6 Roles

Jon Lang wrote: Jonathan Worthington wrote: Ovid wrote: Though I have issues with Jonathan's approach (I don't like classes silently discarding role methods as this has caused us many bugs at the BBC), it's much cleaner that what I see here. s/Jonathan'

Re: YAPC::EU and Perl 6 Roles

Ovid wrote: - Original Message From: Timothy S. Nelson class PracticalJoke { has Bomb $bomb handles ; has Spouse $spouse handles ; } Note that I have no idea where (if anywhere) the type goes in this. Hopefully someone will correct me here. Note that this does not us

Re: YAPC::EU and Perl 6 Roles

Brandon S. Allbery KF8NH wrote: On Jul 7, 2009, at 08:13 , Jonathan Worthington wrote: Brandon S. Allbery KF8NH wrote: I was trying to figure out how to do it with nextsame, but that's not looking very simple. On the other hand, if they were multis then they get added to the multi cand

Re: YAPC::EU and Perl 6 Roles

Brandon S. Allbery KF8NH wrote: On Jul 7, 2009, at 07:34 , Jonathan Worthington wrote: Jon Lang wrote: I believe that the official word is to say: class PracticalJoke does Bomb does Spouse { method fuse () { Bomb::fuse } method explode () { Spouse::explode } } This way won't

Re: YAPC::EU and Perl 6 Roles

Jon Lang wrote: I believe that the official word is to say: class PracticalJoke does Bomb does Spouse { method fuse () { Bomb::fuse } method explode () { Spouse::explode } } This way won't work, because: * It's doing a sub call to something that's a method * The lookup won't wor

Re: YAPC::EU and Perl 6 Roles

Ovid wrote: Giving a talk about roles at YAPC::EU in Lisbon Hey, me too! :-) and I'm a bit stuck on how to translate a Perl 5 example into Perl 6. Basically, Imagine a "PracticalJoke" class which has fuse() and explode methods(). It needs the timed fuse() from a Bomb role and a non-lethal

Re: Array variables as formal parameters ???

Hi, Little clarification... Henry Baragar wrote: I think that in your "Example 1", that you may be making too making too much of a distinction between "$a" and "@a". That is: sub f2(@y) {...} has exactly the same signature as sub f2($x is Array) {...} In other words, they both take

Re: Meditations on a Loop

Daniel Ruoso wrote: Em Sex, 2009-05-22 às 01:25 -0500, John M. Dlugosz escreveu: @primes = do $_ if prime($_) for 1..100; becomes @primes = $_ when prime($_) for 1..100; you gained one stroke, it's certainly better... I think it's time to play golf with Perl 6 already ;) joke

Re: r26700 - docs/Perl6/Spec

Moritz Lenz wrote: Jon Lang wrote: @@ -1836,6 +1836,12 @@ prototype objects, in which case stringification is not likely to produce something of interest to non-gurus.) +The C<.^parents> method by default returns a flattened list of all +parents sorted in MRO (dispatch) order. Other option

.WALK

Hi, I've just checked in a test file for .WALK as spec'd in S12. http://svn.pugscode.org/pugs/t/spec/S12-introspection/walk.t While I'm happy :canonical, and :super are correct (the first is just C3 by default and the second just those from the superclass) and I think :breadth is also, I'm a

Re: S08 Draft questions (Captures and Signatures)

Jon Lang wrote: Invocants: * Is it illegal to specify an invocant in a sub, or is it merely nonsensical? That is, should the compiler complain, or should it silently treat the invocant as the first positional parameter? (The latter has the advantage that you don't have to worry about what the

Re: r25891 - in docs/Perl6/Spec: . S32-setting-library

Daniel Ruoso wrote: Em Sex, 2009-03-20 às 14:08 +0100, Jonathan Worthington escreveu: It's probably a minor issue, but part of me wants Junction to be OK too for explaining stuff. Telling people the default parameter type is Any, to accept anything they can write Object and to accept

Re: r25891 - in docs/Perl6/Spec: . S32-setting-library

Daniel Ruoso wrote: Em Qua, 2009-03-18 às 18:50 -0700, Larry Wall escreveu: On Wed, Mar 18, 2009 at 06:32:18PM -0700, Jon Lang wrote: : > +method !eigenstates (Junction $j: --> List) : : Shouldn't that be lowercase-j junction? Maybe, though there might be a Junction role involved for su

Re: r25821 - docs/Perl6/Spec

Mark J. Reed wrote: Shouldn't that desugar to (Int $ where 0)? After all, 0.WHAT is Int... Yes, I proposed that in my second reply too, after realizing .WHAT gave us that too. :-) Of course, then someone will expect multi sub fib (0|1) { return @_[0] } to DTRT here... That's fine, bec

Re: r25821 - docs/Perl6/Spec

Jonathan Worthington wrote: Moritz Lenz wrote: pugs-comm...@feather.perl6.nl wrote: +You can leave out the block when matching against a literal value of some +kind: + +multi sub fib ($n where 0|1) { return $n } +multi sub fib (Int $n) { return fib($n-1) + fib($n-2) } + +In fact

Re: r25821 - docs/Perl6/Spec

Moritz Lenz wrote: pugs-comm...@feather.perl6.nl wrote: +You can leave out the block when matching against a literal value of some +kind: + +multi sub fib ($n where 0|1) { return $n } +multi sub fib (Int $n) { return fib($n-1) + fib($n-2) } + +In fact, you can leave out the 'where' d

Re: Roles driven by events

Ovid wrote: Having a problem with the following role in Perl 5: package PIPs::ResultSource::Role::HasTags; use Moose::Role; requires 'do_setup'; after 'do_setup' => sub { ... }; So far this has worked really well, aside from that one class which didn't call 'do_setup'. Oops. Requiri

Re: a junction or not

Richard Hainsworth wrote: The following (the n:> is to mark the lines) are legal: 1:> my @x = 1,2,3,4; ([+] @x).say; # output 10 2:> my @x = 1|11,2,3,4; ([+] @a).perl.say; # output any(10,20) 3:> my @x = 1|11,2,3,4; ([+] @a).eigenstates.min.say; # output 10 However, the next line isnt 4:> my @x

Re: Recursive Runtime Role Reapplication Really Rebounds

Daniel Ruoso wrote: Em Qui, 2009-03-12 às 10:28 -0700, Larry Wall escreveu: On Thu, Mar 12, 2009 at 08:51:45AM -0700, Ovid wrote: : > From: David Green : > I suppose, but is there a reason why you want to apply roles instead of coercing : > the results? : Because I am coming from Moose inst

References to parts of declared packages

Hi, If we declared, for example: role A::B {}; Then what should a reference to A be here? At the moment, Rakudo treats it as a post-declared listop, however I suspect we should be doing something a bit smarter? If so, what should the answer to ~A.WHAT be? Thanks, Jonathan

Re: [PATCH] Add .trim method

Ovid wrote: - Original Message In the pir, doesn't the "s = self" line copy self, thus ensuring that I'm changing "s" and not "self"? No, it's binding. Or do I need "s = clone self" (or however it's written). Yeah, but also note that substr would return a copy... Can't sa

Re: [PATCH] Add .trim method

Aristotle Pagaltzis wrote: * Ovid [2009-01-12 16:05]: Or all could be allowed and $string.trim(:leading<0>) could all $string.rtrim internally. ++ Note you can write it :!leading too. :-) Jonathan

Re: multi return values

Andy Colson wrote: Hi all, what's wrong with this code: use v6; sub multireturn($x, $y) { my $a = $x * 2; my $b = $y * 2; return($a, $b); } my($a, $b) = multireturn(2, 3); Nothing that I can see. using: This is Rakudo Perl 6, revision 32970 built on parrot 0.8.1-devel for i486-

Re: A question about role-private attributes

[EMAIL PROTECTED] wrote: I am trying to understand the following small portion from S12, and it seems slightly ambiguous to me: === from S12: You may wish to declare an attribute that is hidden even from the class; a completely private role attribute may be declared like this: C The na

Re: Should $.foo attributes without "is rw" be writable from within the class

Jon Lang wrote: Daniel Ruoso wrote: TSa wrote: May I pose three more questions? 1. I guess that even using $!A::bar in methods of B is an access violation, right? I.e. A needs to trust B for that to be allowed. Yes 2. The object has to carry $!A::bar and $!B::bar

Re: Should $.foo attributes without "is rw" be writable from within the class

Moritz Lenz wrote: Yes, I know that $.stuff actually translates to $( self.stuff ), so without 'is rw' there is no rw accessor generated - but couldn't we just fake assignment to '$.foo' to actually affect '$!foo'? Why not just assign to $!foo, which is always read/write (since the rw affect

Re: Quick questions on classes re S12

Hi, Answers as I understand things... John M. Dlugosz wrote: 1) How do you declare a private method? I see how you call one, but not how to define one. my method foo { ... } 1b) Is the intent that $!foo without an explicit invocant refers to self, as opposed to $.bar or .bar which refers to

Closure vs Hash Parsing

Hi, There is in the spectests this example: my $text = "abc"; my %ret; %ret = map { $_ => uc $_; }, split "", $text; is ~%ret.kv, "a A b B c C", "=> works in a map block"; However, it seems from S06: "|{...}| is always a block. However, if it is completely empty or consists of a single list,

S29 - Time

Hi, S29 says: "Returns a |Time| object. There are a number of uses for this object, all of which can be found in the documentation for |Time|." However, I don't see that documentation in S29, and have taken a browse around the Pugs repository and don't see any sign of it there either. Am I

Re: A few multiple dispatch questions

Larry Wall wrote: On Tue, Aug 05, 2008 at 06:17:30PM +0200, Jonathan Worthington wrote: Hi, I am currently reviewing bits of the spec surrounding multiple dispatch and, of course, have a question or two (I'll probably have some more later, as the dust settles in my head). 1) The

A few multiple dispatch questions

Hi, I am currently reviewing bits of the spec surrounding multiple dispatch and, of course, have a question or two (I'll probably have some more later, as the dust settles in my head). 1) The spec says: -- A proto also adds an implicit multi to all routines of the same short name within its

Range smart-matching

Hi, I found in one of the spec tests for Ranges: my $r = 1..5; ok(($r).ACCEPTS($r), 'accepts self'); ok(($r).ACCEPTS(1..5), 'accepts same'); ok($r ~~ $r, 'accepts self'); ok($r ~~ 1..5, 'accepts same'); And implemented this, but then Pm pointed out that it's not actually mention

Interrogating signatures

Hi, Is there an introspection interface for signatures defined anywhere? I've looked through the synopses and don't see one. I'm thinking things like: * Can you do .arity and .count of a signature? * Can you iterate over a signature to get each element in there? * If so, what sort thing thing

Re: Google index and subsets (two topics for the price of one!)

Ovid wrote: Well, looking at the examples that you and Jonathan listed, I see I should refine my question. For example: subset Crosshair of Point where { $_.inside_of($target_area) || $target_area.has_moved ?? $_.move_inside($target_area) :: $target_area.move_outside

Re: Google index and subsets (two topics for the price of one!)

Ovid wrote: Specifically, I was looking for the documentation on how subsets work See S12: http://dev.perl.org/perl6/doc/design/syn/S12.html#Types_and_Subtypes as it looks like we can get declarative style constraint programming for free: subset Crosshair of Point where { $_.inside_of($t

my TypeName $x;

Hi, I'm looking for answers/clarification on what (if taken as individual programs) $x is in each case. my Int $x; # $x is Int protoobject say $x; # Int say $x.WHAT; # Int class Foo { } my Foo $x; # $x is Foo protoobject say $x; # Foo say $x.WHAT; # Foo # This

Re: not a reference - What does this mean?

John M. Dlugosz wrote: Perl 6 doesn't have references anymore, it has captures. So, what does the following mean: @x = ; $a = [1, 2, [EMAIL PROTECTED]; I imagine that the 3rd element of the Array is itself an Array, and is the same object that is bound to @x. But captures are lazy context-

Re: First look: Advanced Polymorphism whitepaper

John M. Dlugosz wrote: Andy_Bach-at-wiwb.uscourts.gov |Perl 6| wrote: in. Er, so would: my CGI::Simple $x .= new; my $y = CGI::Simple.new; mean that: $x $y is not true? Or would there be a way to tell them apart, on a class (?) level. The actual dynamic type at run time of the values i

Re: Idea: infer types of constants

TSa wrote: Jonathan Worthington wrote: Miller, Hugh wrote: Was that private communication or on another mailing list? It was also sent to perl6-language, through I was on the To or Cc line too, so I guess that's how I got it but the list, somehow, didn't. Not sure why the original

Re: Idea: infer types of constants

Miller, Hugh wrote: What about the type support (system) one sees in ML ? (e.g., the way it assigns automatically types can be assigned, does not require specific types when they are not needed, flags incompatibilities, etc.) Do those things not fit well with Perl's approaches and aims ? They

Re: Idea: infer types of constants

Mark J. Reed wrote: I don't care for the use of * there, but it would be nice to have some way to declare the variable to have the type implied by its initializer, where the complier can tell what that is, so you could remove the redundancy in this: my Dog $fido = new Dog(); while still allowin

Re: calling parrot from perl6

Richard Hainsworth wrote: Given a function implemented in parrot, how can it be called from a perl6 program? To use functions from a class or module in a different language, you will be able to use "use" to include the module, but with the language name out the front. So: use parrot:SomeModul

Parrot 0.5.1 "Hatachi" Released!

-- Lebennin Silver flow the streams from Colos to Erui In the green fields of Lebennin! Tall grows the grass there. In the wind from the Sea The white lilies sway, And the golden bells are shaken of mallos and alfirin In the green fields of Lebennin, In the wind from the Sea! -- On

Re: Working on punie + rindolf (the implementation) Reloaded

chromatic wrote: On Tuesday 10 April 2007 18:51, Shlomi Fish wrote: (Although it seems the most interesting promises made by parrot - fast typeless code for example - are not going to be delivered, too). Hmmm I haven't been closely following Parrot. Despite this menti

Re: Perl5 -> Perl 6 Translations Design Document

"Sage La Torra" <[EMAIL PROTECTED]> wrote: I've got a design document detailing the first few translations I'll be handling, and I'd greatly appreciate feedback and advice. I may be off base here, or in the alternate pointing out a corner case that's of little significance, but: -Compound sta

Re: Concurrency: hypothetical variables and atomic blocks

"Jonathan Scott Duff" <[EMAIL PROTECTED]> wrote: On Thu, Jun 01, 2006 at 02:22:12PM -0700, Jonathan Lang wrote: Forgive this ignorant soul; but what is "STM"? Software Transaction Memory Well, Software Transactional Memory if I'm being picky. :-) Some info and an interesting paper here:-

Re: Perl 6 Summary for 2005-10-10 through 2005-10-24

"Matt Fowles" <[EMAIL PROTECTED]> wrote: =head3 Obsolete Win32 Exports Michael Walter found and removed some obsolete Win32 Exports. Jonathan Worthington applied the patch. Weren't we planning on auto generating these? The Plan is to mark functions that are to be exporte

Re: Perl 6 fears

I'll attempt to answer a couple of the Parrot fears. :-) "Doug McNutt" <[EMAIL PROTECTED]> wrote: I fear that Parrot will not come into widespread use until perl 6 is released. Parrot might not be ready to come into widespread use until Perl 6 is released - there's some stuff missing yet. B

Re: ^method ?

"Brent 'Dax' Royal-Gordon" <[EMAIL PROTECTED]> wrote: Like the decision about which side of the road cars should drive on, it really doesn't matter *which* choice is taken, as long as *something* is decided. The only thing is, there already is a decided way to do it so far as I can see... I've s

Re: Fwd: Re: Pugs 6.2.0 released.

"Juerd" <[EMAIL PROTECTED]> wrote: You both use "iff". What does that mean? I believe it's to be read "if and only if". Jonathan

Re: scalar subscripting

"Luke Palmer" <[EMAIL PROTECTED]> wrote: > Hans Ginzel writes: > > On Thu, Jul 08, 2004 at 09:12:16PM +1000, Gautam Gopalakrishnan wrote: > > > about string subscripting. Since $a[0] cannot be mistaken for array subscripting > > > anymore, could this now be used to peep into scalars? Looks easier t

Re: div operator

"Alexey Trofimenko" <[EMAIL PROTECTED]> wrote: > > what do you think about adding C operator, akin %, to perl6 core? > > I mean, as$a % $b > really does int($a) % int($b) > and returns modulous, > > so $a div $b > really does int( in

Re: The C Comma

> Honestly you guys, I'm not trolling. I'm just getting a lot of ideas > recently. :-) Honestly, I'm not an expert on Perl 6 syntax. (And I actually am being honest... ;-) But I'll throw in my 2 cents anyway. :-) > > > This word: C. > > So, from a recent script of mine: > > my $n; >

Re: Perl 6's for() signature

> At 10:05 AM 7/31/2003 -0600, Luke Palmer wrote: > >Well, I don't think it's possible, actually. There's a flattening > >list context at the beginning (implying a sugary drink from 7 eleven), > >followed by a code block. But, as we know, slurpy arrays can only > >come at the end of positional pa