»ö« Welcome to Perl 6! | perl6.org/ | evalbot usage: 'p6: say 3;' or rakudo:, or /msg camelia p6: ... | irclog: irc.perl6.org or colabti.org/irclogger/irclogger_logs/perl6 | UTF-8 is our friend!
Set by moritz on 22 December 2015.
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comborico1611 How do you access a program in the REPL? 00:18
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MasterDuke committable6: what do you mean access a program? load a script that's in a file? 00:40
committable6 MasterDuke, ¦what: «Cannot find this revision (did you mean “Echt”?)»
MasterDuke heh. oops
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AlexDaniel MasterDuke: try again? 00:44
MasterDuke comborico1611: what do you mean access a program? load a script that's in a file while you're in the repl? 00:50
timotimo something like EVALFILE?
comborico1611 Masterduke, yes. 00:52
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MasterDuke then timotimo++'s suggestion is what you want 00:53
comborico1611 Oh. I see now that it can be complicated. Nevermind. Thank you, though! 00:54
I was thinking it was a standard affair. 00:56
It's amazing how well my older computer does with this older version of kubuntu, compared to the newer versions. 01:01
I wonder why i had to use --no-check-certificate to download rakudo through bash. 01:08
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Geth doc: 1de9e49efe | (JJ Merelo)++ | doc/Language/subscripts.pod6
Slice examples expanded.

Added a bit of verbiage re-explaining the `*` concept as end-of-collection, and added an example that effectively extracts slices starting with the end of the array or counting from the end.
Hope this closes #1782, if it does not, just let me know.
08:40
synopsebot Link: doc.perl6.org/language/subscripts
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travis-ci Doc build passed. JJ Merelo 'Slice examples expanded. 09:01
travis-ci.org/perl6/doc/builds/343267203 github.com/perl6/doc/compare/2940f...e9e49efeb1
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moritz PSA/ad of the day: "Perl 6 Fundamentals" is available as an ebook for USD 9.99 today: www.apress.com/us/book/9781484228982 15:43
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moritz (it's usually around USD 18 on amazon) 15:45
timotimo alternatively, buy individual chapters for just 30 dollars each! 15:46
moritz yes, a weird leftover from selling 200$+ academic books 15:48
timotimo m)
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El_Che moritz: can you tweet is (so it can be retweeted it)? 16:05
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El_Che lizmat: ^--- valid until tomorrow included it seems, dunno if useful for the weekly: www.apress.com/us/book/9781484228982 16:07
timotimo El_Che: i think you could use our shiny new notable bot?
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Geth perl6.org: 947c13dcd8 | (Zoffix Znet)++ (committed using GitHub Web editor) | source/downloads/index.html
Avoid disambiguation page for zef.
16:14
perl6.org: 22e795272e | (Zoffix Znet)++ (committed using GitHub Web editor) | includes/footer
Avoid zef disambiguation page
16:15
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moritz El_Che: already retweeted from twitter.com/Dhabolt/status/965594633710514177 16:42
Geth doc: 9f96ec655b | (Will "Coke" Coleda)++ | doc/Language/containers.pod6
remove trailing whitespace
16:43
doc: c33b6b221a | (Will "Coke" Coleda)++ | 2 files
learn new word, fix typo
synopsebot Link: doc.perl6.org/language/containers
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sharksoft why is summing a range absurdly fast? 17:45
what does rakudo do that's fancy?
i.e. why does sum(0..1_000_000_000) returns basically instantly?
MasterDuke sharksoft: Range's sum method knows that if it has integer bounds it can use the formula for the sum 17:47
ilmari s: Range, 'sum'
sena_kun sharksoft, I am not sure how exactly it's implemented internally, but I can guess it uses the formula, see e.g. mathcentral.uregina.ca/qq/database/...6/jo1.html
SourceBaby ilmari, Sauce is at github.com/rakudo/rakudo/blob/f748...ge.pm#L663
sharksoft oh that's awesome
thanks!
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lucasb would be interesting if the sum of arithmetic and geometric progressions could also be calculated with a formula 17:51
like 2, 4, 6 ... 100
2, 4, 8, 16 ... 100
but IDK if that's possible 17:52
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timotimo should be 18:00
lucasb: you mean the sum of those, right?
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timotimo hm, actually, perhaps the infrastructure isn't in place yet? 18:01
let's see
m: my $thing = (2, 4, 8, 16 ... 128) but role { method sum { say "hi i'm your custom sum implementation"; 100_000 } }; say $thing.sum 18:02
camelia hi i'm your custom sum implementation
100000
timotimo s: &infix:<...>, \((2, 4, 8), 128)
SourceBaby timotimo, Sauce is at github.com/rakudo/rakudo/blob/f748...rs.pm#L478
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timotimo OK, so if that wants to give any custom sum impl, it'd have to communicate through Seq.new 18:03
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timotimo i mean, the knowledge must pass through the return value of .iterator and the constructor of Seq. or that sub could change 18:04
DrForr o/
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lucasb timotimo: yes, that's want I meant :) 18:09
*what
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lucasb I'm pasting 3 lines here (sorry), for explanation purposes: 18:20
[+] 10, 20 ... 1_000_000 # sum of first N elements
(10, 20 ... 1_000_000)[50_000] # find Nth element
+(10, 20 ... 1_000_000) # how many elements?
If I understand correctly, the result of the 3 operations above can be known by a mathematical formula, correct? 18:21
but since it takes some time to answer, then I guess P6 is adding all those numbers 18:22
this is for arithmetic progression/sequence, but there's also for geometric... 18:23
sharksoft I (without having looked much at the source) think it's actually creating that sequence, then giving you the value
at least that's the only reason I can think of for why (10, 20 ... 1_000_000).elems would take that long 18:24
lucasb sharksoft: I agree :)
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skids I don't think anyone has written any optimizer code for such stuff yet. 18:28
Might be a fun project.
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sharksoft I'm certainly interested in doing some more numerical work in P6...It's just so much nicer than Python/NumPy 18:29
may dig around a bit and see if I can help out 18:30
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timotimo sadly we don't have much multi-dim array features in place :( 18:30
sharksoft yeah I was hoping some of the PDL folks would be interested in porting some of that over
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Zoffix Maybe instead of communicating anything through Seq.new, we could add Iterator.sum-only, similar to how we have .count-only/.bool-only, and any Iterator that can compute the sum of the remaining elements (without exhausting the Seq) would return that value 18:31
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Zoffix And would clean up impl of [+], 'cause IIRC it just checks if the thing is a Range 18:31
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MasterDuke Zoffix++ i like that idea 18:32
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sharksoft +1 18:32
MasterDuke now is .product-only going to far though...?
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Zoffix Ah, [+] just rewrites the call to &sum' 18:33
skids maybe a "reduce-only" that takes the metaop as an argument.
Zoffix If you gonna give it an op to work with, is there any point for the opt in the first place? 18:34
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skids Only if you opt based on that op. 18:34
Zoffix But you can't know what op it is.
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Zoffix m: sub prefix:<[+]> { @_.join: '|' }; say [+] (1, 3 ... 11) 18:36
camelia 1|3|5|7|9|11
skids I dunno how things are plumbed, but why couldn't you?
Zoffix Because it could be a user op. IIRC we don't have any user-land markers for "is from core"
Zoffix looks at how static Optimizer got it implemented 18:37
skids Yeah but you just slow path anything you don't have an implementation for.
Just the point being, introducing a function name for every possible reduction seems a bit less firendly to expansion. 18:38
Zoffix I don't follow. How would you "have an implemention for" anything, based on the op that's given you, if you don't know what that op does? 18:39
skids i.e. you decide to do [+] and [*] then the next guy still has no hook to hang [**] on and has to go through adding that as well.
Zoffix How would `.reduce-only` know what operation to perform, without iterating over the entire sequence and freeding each value through the op?
s/free/fee/
skids I would assume the optimizer would look inside the [+], pull out the "infix:[+]" and you do "if $op === &infix:[=]" in reduce-only. 18:40
Zoffix m: sub foo (\op) { dd op =:= &[+] }; foo &[+]; { sub infix:<+> {}; foo &[+] } 18:41
camelia Bool::True
Bool::False
skids erm &infix:<+>
Zoffix OK. +1
Oh, crap.
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skids (We do also need to ensure we aren't trying to solve the halting problem too :-) 18:43
Zoffix Well, maybe not crap. But my original idea was the user of the Iterator can just do `can` on the iterator, but now it'll need to `can` + check for some sentinel value from reduce-only that the handler was indeed found
.oO( nqp::can(iter, nqp::concat('reduce-&infix:<+>')) )
18:44
Is that too crazy? :)
skids Unless reduce only tailcalls the normal codegen and so always returns code?
Zoffix No idea what that means. 18:45
timotimo m: multi sub do-it(&infix:<+>) { say "sum" }; multi sub do-it(&infix:<*>) { say "product" }; do-it &[+]; do-it &[*]; do-it &[**]
camelia Ambiguous call to 'do-it(Sub+{is-pure}+{Precedence})'; these signatures all match:
:(&infix:<+>)
:(&infix:<*>)
in block <unit> at <tmp> line 1
timotimo m: multi sub do-it((&infix:<+>)) { say "sum" }; multi sub do-it((&infix:<*>)) { say "product" }; do-it &[+]; do-it &[*]; do-it &[**]
camelia Cannot unpack or Capture `sub infix:<+> (Mu $?, Mu $?) { #`(Sub+{is-pure}+{Precedence}|55052656) ... }`.
To create a Capture, add parentheses: \(...)
If unpacking in a signature, perhaps you needlessly used parentheses? -> ($x) {} vs. -> $x {}
o…
timotimo hm, would have to spell it out i guess?
Zoffix I'm talking about a public method on Iterator. What [...] does is only a tiny part of where it'd be used.
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timotimo m: multi sub do-it(&[+]) { say "sum" }; multi sub do-it(&[*]) { say "product" }; do-it &[+]; do-it &[*]; do-it &[**] 18:46
camelia 5===SORRY!5=== Error while compiling <tmp>
Prefix + requires an argument, but no valid term found
at <tmp>:1
------> 3multi sub do-it(&[+7⏏5]) { say "sum" }; multi sub do-it(&[*])
expecting any of:
prefix
DrForr Hrm, 'perl Configure.pl --gen-moar --prefix=...' seems not to generate MoarVM as promised. (first time on this box venturing away from rakudobrew...)
Zoffix DrForr: did you specify --backends=moar? 18:47
huggable: sauce
huggable Zoffix, Install latest version of Rakudo from source: github.com/zoffixznet/r#table-of-contents
timotimo --gen-moar doesn't imply that? though i thought rakudo's configure only(?) has --gen-nqp
DrForr No, but that wasn't mentioned on the download page.
(not deliberately being dense, I just didn't think I would be playing the canary in the coalmine.) 18:48
Zoffix DrForr: what are you running that command on? Rakudo Star download? 18:49
DrForr 2018.01 downloaded directly from rakudo.perl6.org.
Zoffix DrForr: Rakudo Star or Rakudo?
El_Che DrForr: feel free to stick around in #perl6. This is a friendly community
El_Che ducks
DrForr The exact steps on perl6.org/downloads/ - I was having a problem I thought might be relate to rakudobrew, so I finally decided to move away. 18:51
Zoffix I get "Configuring and building MoarVM ..." as the first line of output with those steps
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timotimo if it already finds a moarvm, it won't build it for you because you already have one 18:53
DrForr As do I. The problem, unsurprisingly, appears to be permissions on the /opt directory, but I'm unused to the configuration step actually changing stuff, which is causing my expectations to be violated.
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timotimo Please be aware, that this will install MoarVM and NQP into your given --prefix before Configure.pl exits. 18:54
DrForr I.E. I can tell after reading the scrollback what the problem is, but I didn't expect configuration to do more than just configure.
timotimo ^- in the readme :)
sharksoft I think I needed sudo to install into opt and got that same error without it
Zoffix DrForr: fwiw, there's also this option, that is closer to using rakudobrew (as in, it's latest released compiler + zef rather than quarterly-released distro of compiler + zef + modules): github.com/zoffixznet/r#table-of-contents
DrForr I understand that, I'm just stating that it seems to be violating my expectations. 18:55
El_Che DrForr: that's a common complaint
AlexDaniel El_Che: I'm not sure how I feel about your remarks :)
Zoffix timotimo: your multi thing doesn't work 'cause `sub do-it(&infix:<+>)` is equivalent to `sub do it (Callable $) {}` with name set to &infix:<+>; it doesn't treat it as a literal to multi-dispatch with
timotimo i know ;( 18:56
El_Che AlexDaniel: I remember mst having a look at it some time ago
timotimo aye, it's rather hairy because of the amounts of information that needs to flow from moar through nqp to rakudo 18:57
DrForr sharksoft: Thanks, this by no means is my first rodeo. I'm just reporting what I feel is an install issue.
El_Che as in "most people expect to be safe until the make install"
timotimo yeah :( 18:58
DrForr El_Che: Nod, that was pretty much my expectation. If I didn't suspect something and were someone just starting out with the software I might have been frustrated enough to give up at that point. 19:00
That also means I need to do 'sudo make' to give the installer perms, and that feels wrong. 19:01
timotimo it'd probably be a good idea to output a piece of disclaimer text before and after doing --gen-moar and such
El_Che DrForr: use my pkgs :)
AlexDaniel huggable: deb 19:02
huggable AlexDaniel, CentOS, Debian, Fedora and Ubuntu Rakudo packages: github.com/nxadm/rakudo-pkg/releases
AlexDaniel hmm
Zoffix m: use MONKEY; augment class Seq { method sum { nqp::can($!iter, 'reduce-+') ?? nqp::callmethod($!iter, :name("reduce-+")) !! self.cache.sum } }; say [+] Seq.new(class :: does Iterator { method pull-one {}; method ::('reduce-+') { 42 } }.new); say [+] (1...10)
camelia 42
55
El_Che ah, it's outdated, also Alpine and OpenSUSE nowadays
DrForr If Ubuntu packages are ready I'll keep that in mind for later. I just thought it was better to report my experiences. 19:03
AlexDaniel huggable: deb is Alpine, CentOS, Debian, Fedora, OpenSUSE and Ubuntu Rakudo packages: github.com/nxadm/rakudo-pkg/releases
huggable AlexDaniel, nothing found
AlexDaniel huggable: deb :is: Alpine, CentOS, Debian, Fedora, OpenSUSE and Ubuntu Rakudo packages: github.com/nxadm/rakudo-pkg/releases
huggable AlexDaniel, Added deb as Alpine, CentOS, Debian, Fedora, OpenSUSE and Ubuntu Rakudo packages: github.com/nxadm/rakudo-pkg/releases
El_Che DrForr: I am joking. Of course compiling is fine for advanced users like you 19:04
DrForr No offense taken. I"m just saying the principle of least surprise seems to be violated. At least for me, and it may be turning other potential users away. 19:05
AlexDaniel if only we could get zef officially packaged for debian… 19:06
DrForr And this should really be taking place on -dev, not here.
AlexDaniel that would make rakudo so much more useful
Zoffix m: use MONKEY; augment class Seq { method sum { nqp::can($!iter, &[+].WHICH) ?? nqp::callmethod($!iter, :name(&[+].WHICH)) !! self.cache.sum } }; say [+] Seq.new(class :: does Iterator { method pull-one {IterationEnd}; method ::(BEGIN &[+].WHICH) { 42 } }.new); say [+] (1...10) 19:07
camelia 42
55
El_Che AlexDaniel: does zef break one of Debian's expectations? (reproducible builds?)
Zoffix hehe, this is awesome.
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AlexDaniel El_Che: I don't know, maybe talk to @dod38fr about that 19:08
El_Che AlexDaniel: thx
AlexDaniel El_Che: according to bugs.debian.org/cgi-bin/bugreport....=867237#10 he plans to package modules and not zef, but I don't know the reasoning
.seen dod 19:09
yoleaux I haven't seen dod around.
El_Che Well, there is a workaround for that like perl5 does: include zef (or a variant) in the core distro?
AlexDaniel core distro? 19:10
El_Che like cpan is part of perl5
zef/$some-installer could be part of rakudo
so you get out of the box the possibility to install modules 19:11
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El_Che even if better alternatives (e.g. cpanm) exist 19:11
$ dpkg -S /usr/bin/cpan -> perl: /usr/bin/cpan 19:12
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El_Che as "go get" is part of golang, and so on 19:13
(this is probably more applicable to #rakudo than to #perl6, but you get what I mean) 19:14
DrForr And at this point the 'Stage parse' is definitely stuck. Package ahoy. 19:17
El_Che DrForr: it's probably not stuck, it's takes some time
DrForr Hrm. I'll nuke and retry, but I do have to get stuff done... 19:18
El_Che DrForr: are you sure it's stuck?
DrForr Probably was runing for ~10min, quite a bit longer than rakudobrew takes. 19:19
Not that I'm criticising. I'll restart and head out to get some shopping done. 19:20
El_Che DrForr: yes, a pkg with a docker build (installing all deps en build-essential) takes less on travis, so yes, it sounds stuck
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DrForr Back in a few, need to snarf food. 19:21
Thanks for the confirmation :/ 19:34
package is far far too out-of-date.. 2014.07-4. 19:38
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mspo I need to learn how to make .debs 19:43
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El_Che mspo: I use fpm for that 19:44
mspo El_Che: I'd prefer to do things properly
El_Che mspo: properly is a relative term :) 19:45
mspo well I prefer to not do it at all, but otherwise..
El_Che mspo: fpm is fine for self contained stuff
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DrForr And now I grab the latest Ubuntu in order to actually install docker, as apparently the current VM is stuck between versions that let Docker work. 19:52
El_Che DrForr: I use docker on my home server (Ubuntu 16.04) and at work we use Centos 7 for Docker 19:54
DrForr: both work fine
(I also use docker on Ubuntu 17.10 (laptop) and the latest macos: all without problem)
DrForr Couldn't download the package on whatever version the current VM uses. No worries; I'm understanding more of the user experience new users have, and empathize deeper. 19:55
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DrForr 'sokay, moving out of X back to CLI and port-forwarding seems a better way to deal with VirtualBox anyway. 19:57
El_Che DrForr: you know that Docker runs fine on Win10, right? 19:58
DrForr I'm sure it does; I don't need to start learning a new system an hour before bedtime though... 19:59
El_Che DrForr: nothing new. Just install it, and run the regular docker commands in a shell 20:00
b2gills I prefer `reduce:op[ &[+].WHICH ]` over `&[+].WHICH` 20:01
m: use MONKEY; augment class Seq { method sum { nqp::can($!iter, BEGIN "reduce:op<{&[+].WHICH}>") ?? nqp::callmethod($!iter, :name(BEGIN "reduce:op<{&[+].WHICH}>")) !! self.cache.sum } }; say [+] Seq.new(class :: does Iterator { method pull-one {IterationEnd}; method reduce:op[BEGIN &[+].WHICH] { 42 } }.new); say [+] (1...10)
camelia 42
55
DrForr I'm sure; I just prefer to have a UNIX backdrop available.
El_Che DrForr: you l33t haxor
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DrForr I was a touch surprised when the best name Ernest could come up with for a darknet trade site was "1337 Haxor Warezhouse"... at that point things started to fall apart for me in the book. (Ready Player One) 20:05
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buggable New CPAN upload: Font-FreeType-0.0.6.tar.gz by WARRINGD cpan.metacpan.org/authors/id/W/WA/...0.6.tar.gz 20:30
jimav Hi, Is there a way to see arguments in a backtrace (like in perl5)?
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jimav sub func($y, $z) { die "bug in a" }; func(22,33); ... just says func was called without shoing the args (22,33) 20:31
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[Coke] You can theoretically get more information with perl6 --ll-exception (but not that) 20:36
jimav How can that be enabled from inside the script (e.g. with "use...something")? 20:37
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Voldenet ugh, perl doesn't do that by default, does it? 20:38
I believe Carp does print arguments
[Coke] jimav: can't, as far as I know
I think we'd not want it on by default to avoid logging things that should be confidential 20:39
(even if we did do it - log arguments, I mean)
MasterDuke the arguments are included in some error messages 20:40
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MasterDuke m: say "abc".Num 20:41
camelia Cannot convert string to number: base-10 number must begin with valid digits or '.' in '3⏏5abc' (indicated by ⏏)
in block <unit> at <tmp> line 1
Voldenet jimav: you could write a /debugging/ wrapper though :D
m: sub func($y, $z) { die "bug in a" }; sub d(&code) { return -> |c { CATCH { |c.say }; &code(|c); } }; d(&func)(22,33); 20:42
camelia \(22, 33)
bug in a
in sub func at <tmp> line 1
in block <unit> at <tmp> line 1
Voldenet I bet it could be prettier
Can perl6 decorate its functions, like python? 20:43
jimav Voldenet: That's pretty inconvenient. What if the args you need to see to debug something come from level 42 in a 57-level call? 20:45
Let me restate that: That wrapper better than just putting in print statements (doesn't pollute output until something croaks) 20:46
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jimav Voldemort: ...but still requires modifying source code and re-creating the crash exactly the same way 20:48
I would like a way to just enable seeing args on every crash backtrace (at the top of the main unit of a particular script) 20:49
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Voldenet ugh, yeah, it's pretty inconvenient like that, I wonder if it's doable 20:49
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jimav Does anyone know what perl6 --ll-exception does internally, and whether that (whatever it is) can be done within a script? 20:51
Voldenet m: multi sub trait_mod:<is>(Routine $r, :$debugged) { $r.wrap( -> |c { CATCH { c.say }; callsame; }) }; sub func ($y, $z) is debugged { die "bug in a" }; func(22,33);
camelia \(22, 33)
bug in a
in sub func at <tmp> line 1
in block at <tmp> line 1
in block <unit> at <tmp> line 1
Voldenet okay, this is a bit more convenient
you can just append "is debugged" to the method
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MasterDuke --ll-exception mostly just doesn't truncate the backtrace at where user code stops (as i understand it) 20:54
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moritz --ll-exception doesn't do any kind of filtering 20:57
jimav MasterDuke: Yea, I just tried it and args are not shown
Voldenet: Can I add traits to an already-defined sub? Then I could use your idea without having to modify the source code of the subs of interest 20:58
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comborico1611 Who's ready for a newb question? 21:07
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Voldenet jimav: I'm not sure, I've just learned that it can be done with traits, so I'm not an expert :P 21:24
jimav Voldenet: Ok, thanks. I tried various constructs with "augment" but that seems to only work for Classes. 21:28
I've got to go. Cheers.
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[Coke] comborico1611: just go ahead and ask it. 21:29
comborico1611 When you are working with an editor that has autocomplete, are you suppose to just type the closing parens or quotes along with what is already there? I undersatnd it will replace the autocomplete, but it seems like what's the point? Why not just not have autocomplete, or am I doing something wrong? 21:30
[Coke] ok, that I cannot help with. :) 21:31
comborico1611 Heh. Autocomplete with parens and quotes seems stupid. 21:32
sena_kun comborico1611, well, the thing is that editor cannot(or, well, doesn't do that properly, at least) "guess" where you want to stop type your arguments to move further. But I still think it's a nice feature, because you have less chances to forgot to close some )))))) in the end. 21:34
just an opinion, of course
comborico1611 sena_kun: I see.
I don't see it hurting, as long as I get use to it. At the moment, I find it distracting -- I add spaces often. Example ( stuff here ). 21:36
And ( "string" ) is weird because I'm adding spaces next to existing characters. 21:37
Thanks for the feedback, though!
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Voldenet autocompleting parens and brackets is a bit annoying 21:37
sena_kun comborico1611, I hope you still can disable autocomplete if you control your text editor. :) 21:38
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comborico1611 sena_kun: I'm currently experimenting with a new one (Atom). I typically use Emacs, but I'm getting frustrated by the complexity. 21:39
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Xliff If I create an action class for a grammar, will that grammar act on rules, even if those rules are defined in another module? 23:17
s/that grammar/that action class/ 23:18
lizmat And another Perl 6 Weekly hits the Net: p6weekly.wordpress.com/2018/02/19/...6ya-giris/ 23:29
comborico1611 Yay! 23:34
TimToady Xliff: as long as any rules or actions of a given name can be found by ISA relationship, sure 23:35
comborico1611 So I was pondering this week about learning Common Lisp. It was like pulling teeth to get the guys over on the lisp channel to write me up a sample request program. I can see why now. It took forever. I took it for granted that it was short in Perl6. 23:42
MasterDuke i looked a little bit a common lisp, but didn't really like it (couldn't really say why exactly), but really like racket (formerly known as PL Scheme) 23:45
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comborico1611 MasterDuke: Want to see a comparison of the two for a program that converts seconds into years months days hours mins seconds? 23:47
MasterDuke sure 23:50
comborico1611 MasterDuke: gist.github.com/COMBORICO/7c443861...d482761b30 23:52
MasterDuke so many lines 23:55
comborico1611 It is quite strange. 23:56
MasterDuke fwiw, polymod could be used for an alternate perl 6 version. docs.perl6.org/routine/polymod
comborico1611 Hmm. Thank you! 23:57
lucasb comborico1611: how the forth CL version works? the function evaluates perl syntax given as s-expressions? 23:58