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🦋 Welcome to the MAIN() IRC channel of the Raku Programming Language (raku.org). This channel is logged for the purpose of keeping a history about its development | evalbot usage: 'm: say 3;' or /msg camelia m: ... | Log available at irclogs.raku.org/raku/live.html . If you're a beginner, you can also check out the #raku-beginner channel! Set by lizmat on 8 June 2022. |
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| Nemokosch | The uk is also missing the uk's weather | 06:34 | |
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| Geth | ecosystem: JRaspass++ created pull request #608: Update a few repos from "master" to "main" |
11:26 | |
| ecosystem: 10b1efa3a8 | (James Raspass)++ (committed using GitHub Web editor) | META.list Update a few repos from "master" to "main" |
11:28 | ||
| ecosystem: ce7d0a2e34 | (Juan Julián Merelo Guervós)++ (committed using GitHub Web editor) | META.list Merge pull request #608 from JRaspass/patch-2 Update a few repos from "master" to "main" |
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| [Coke] | (33) wow, it's 16 here this morning. | 12:23 | |
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| waffleiron | hello in raku how would i replace a backreference with the uppercase version? | 14:52 | |
| lizmat | $1.uc ? | 14:55 | |
| waffleiron | sorry i meant lowercase and .lc doesnt seem to work | 14:57 | |
| i used to be able to type \l | |||
| lizmat | where? | ||
| waffleiron | perl -pe's/(\p{Uppercase})/\l\1/g' file | 14:58 | |
| lizmat | waffleiron: first off, positional captures start counting at 1 in Raku | 15:00 | |
| m: say "foofoo bar".match(/ (foo) $0 /)' | 15:01 | ||
| camelia | ===SORRY!=== Error while compiling <tmp> Two terms in a row at <tmp>:1 ------> say "foofoo bar".match(/ (foo) $0 /)⏏' expecting any of: infix infix stopper postfix statement end … |
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| lizmat | m: say "foofoo bar".match(/ (foo) $0 /) | ||
| camelia | ｢foofoo｣ 0 => ｢foo｣ |
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| lizmat | m: say "foofoo bar".subst(/ (foo) $0 /, { $0.uc }) | 15:02 | |
| camelia | FOO bar | ||
| lizmat | m: say "foofoo bar".subst(/ (foo) $0 /, { $/.uc }) | ||
| camelia | FOOFOO bar | ||
| waffleiron | finding this output hard to read sorry | 15:03 | |
| lizmat | m: say "foofoo bar".subst(/ foo /, { $/.uc }) | ||
| camelia | FOOfoo bar | ||
| lizmat | m: say "foofoo bar".subst(/ foo /, { $/.uc }, :g) | ||
| camelia | FOOFOO bar | ||
| waffleiron | what is $/ | 15:05 | |
| taht seems to ffix it it wont work with numbers | |||
| lizmat | docs.raku.org/syntax/$$SOLIDUS | ||
| waffleiron | ===SORRY!=== Error while compiling -e | 15:07 | |
| Undeclared routine: | |||
| bash used at line 1. Did you mean 'hash'? | |||
| if i use $0 | |||
| lizmat | without code, it's hard to tell what's going on | 15:08 | |
| waffleiron | perl6 -npe"s:g/(<upper>)/{$0.lc}/" file | ||
| lizmat | what does raku --version say ? | 15:10 | |
| waffleiron | implementing Perl 6.c. | 15:11 | |
| lizmat | looks like you have a pretty old version then | 15:12 | |
| it should something like: | |||
| % raku --version | |||
| Welcome to Rakudo™ v2022.07-13-g10feda116. | |||
| Implementing the Raku® Programming Language v6.d. | |||
| Built on MoarVM version 2022.07. | |||
| waffleiron | k | ||
| lizmat | maybe get a more recent version before we go on ? | ||
| waffleiron | got a newer version | 15:15 | |
| raku -npe"s:g/(<upper>)/{$0.lc}/" "file" | |||
| No such method 'lc' for invocant of type 'Any' | |||
| in code at -e line 1 | |||
| in block <unit> at -e line 1 | |||
| lizmat | what do you think <upper> does? | 15:16 | |
| waffleiron | finds an uppercase unicode letter | ||
| lizmat | ok, so we're on the same page then :-) | 15:17 | |
| waffleiron | phew | 15:18 | |
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| waffleiron | i'm kind of having trouble when i try to search for things the raku way | 15:21 | |
| lizmat | fwiw, I'm not a regular user of -np :-) | 15:22 | |
| waffleiron | well i just started to use it i sort of accidently used perl5 but i really wanted to use perl6 | 15:23 | |
| lizmat | well, it's called Raku nowadays :-) | 15:24 | |
| raku -npe '$_ .= subst("e","a",:g)' file | |||
| so... | 15:25 | ||
| waffleiron | i get load of potteryh when i search raku :P | ||
| Nemokosch | as they say: search friendly attempt is to always add "lang" | 15:26 | |
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| lizmat | raku -npe '$_ .= subst(/ <upper> /, { $/.lc },:g)' file | 15:26 | |
| waffleiron | sec | ||
| i wanted it to work using capture groups | 15:27 | ||
| Nemokosch | golang, rakulang, redlang etc | ||
| ~~erlang~~ | |||
| lizmat | why ? | 15:28 | |
| waffleiron | try searching for raku books on ebay and you'll see what i mean | ||
| lizmat | "raku programming language" and rakulang should give you better results | 15:29 | |
| Nemokosch | I'm not surprised if you eventually won't find many books on ebay, though... | ||
| lizmat | raku -npe 's:g/ <upper>+ /{ $/.lc }/' | 15:30 | |
| waffleiron: so, why do you want to use backrefs ? | 15:31 | ||
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| lizmat | raku -npe 's:g/ (<upper>+) /{ $0.lc }/' Changes | 15:31 | |
| Nemokosch | doesn't p override n by the way | ||
| waffleiron | a i want to know how to do it B i've done it before in previous languages 3 . I don't have a specific reason | ||
| like if i've done it before maybe i think i can be usefull again | 15:32 | ||
| at i'm just testing and learning | |||
| atm | |||
| lizmat | ok :-) | 15:33 | |
| waffleiron | I've kind of used regexes quite alot before as well ( i probally suck at them) | 15:34 | |
| lizmat | well, fwiw I don't like -np in Raku much, as it is too much like Perl's | 15:35 | |
| I guess it was one of the first features implemented way back when | |||
| waffleiron | yeah i tried to search for launch options i did'nt seem to find the info | 15:36 | |
| lizmat | raku -h | ||
| waffleiron | btw your code works any idea why it didnt work before? | 15:40 | |
| the plus makes it work i guess | 15:41 | ||
| nope | |||
| Nemokosch | still, pretty please 🥺 | 15:42 | |
| confirm or deny pls | |||
| I think p is just n with an additional ".say" | |||
| lizmat | yup | ||
| waffleiron | the n option is that not neeeded if you have a loop in the code? | ||
| lizmat | -e will just run your code once | 15:43 | |
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| waffleiron | i ask becasue i was messing around pipeing input from standard input and one the options didn't have -n but still went through the input | 15:44 | |
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| Nemokosch | the p option also gives you the loop iirc | 15:44 | |
| waffleiron | anyways ty i now know i should use single quotes and not double quotes when using regex | 15:46 | |
| it seems that was the problem i thought i needed double quotes when using inline code | 15:47 | ||
| Nemokosch | why? 🙂 | ||
| lizmat | waffleiron: i think it was the shell messing up there | ||
| waffleiron | ah ok maybe | ||
| lizmat | you *can* use single quotes, but when used in a shell, the shell messes up | ||
| well, fsvo messing up :-) | |||
| Nemokosch | probably | 15:48 | |
| waffleiron | i'm probally doding things all wrong there always seems to be a million ways to do things | 15:50 | |
| wrong things | |||
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| lizmat | waffleiron: fwiw, I learned a few things about -n -p in Raku today :-) | 15:54 | |
| waffleiron | cool :) | ||
| Nemokosch | so we have || slipping on Hashes in the 6.e preview | 16:08 | |
| what happens - better asked: what should happen - if the thing to slip by, is empty? | |||
| waffleiron | (as a person who know nothing about raku) could you not do either by setting some sort of option? | 16:10 | |
| and let people choose | |||
| anyways thanks for all your help everone | 16:23 | ||
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| Nemokosch | I wish there was //:= as well :DD | 16:42 | |
| deoac | When using the `Test` module, how do I test the output to `$*OUT`? | 16:43 | |
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| lizmat | deoac: raku.land may have some modules | 17:03 | |
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| lizmat | personally I'd use Trap for its simplicity | 17:03 | |
| m: raku.land/zef:lizmat/Trap | |||
| camelia | ===SORRY!=== Error while compiling <tmp> Confused at <tmp>:1 ------> https:⏏//raku.land/zef:lizmat/Trap expecting any of: colon pair |
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| lizmat | raku.land/zef:lizmat/Trap | 17:04 | |
| rather :-) | |||
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| lizmat | or maybe silently: raku.land/zef:lizmat/silently | 17:04 | |
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| leont still has to finish their presentation, but this heat is melting their brain | 17:13 | ||
| lizmat | well, you're theb first on Sunday... so maybe still a little time | 17:16 | |
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| p6steve | m: role R { method new {say 'yo'}}; my $x = 42 but R; | 19:48 | |
| camelia | ( no output ) | ||
| p6steve | ^^^ wonders why new() or TWEAK() don't fire on a mixin? | 19:49 | |
| deoac | Thanks, lizmat. `Trap` is *exactly* what I need for testing. | 20:05 | |
| I wonder why there's nothing similar in `Test` . | 20:06 | ||
| lizmat | well, maybe Trap will make it into core at some point :-) | ||
| p6steve | is there a way to constrain $x to eg. defined from the mixin R? | 20:10 | |
| SmokeMachine | m: role R { say 'yo' }; my $x = 42 but R; | 20:18 | |
| camelia | yo | ||
| SmokeMachine | m: role R { method COMPOSE { say 'yo' } }; my $x = 42 but R; # COMPOSE still doesn’t to it, does it? | 20:20 | |
| camelia | ( no output ) | ||
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| p6steve | ^^^ wonders why new() or TWEAK() don't fire on a mixin? | 20:24 | |
| oops | |||
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| p6steve | m: role R { say self }; my $x = 42 but R; | 20:29 | |
| camelia | ===SORRY!=== Error while compiling <tmp> 'self' used where no object is available at <tmp>:1 ------> role R { say ⏏self }; my $x = 42 but R; expecting any of: argument list term |
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| p6steve | ^^^ not getting it ... I would like the mixin to be able to get the invocant and test it for definedness when "constructed" | 20:30 | |
| lizmat | there's only an invocant inside a method | 20:33 | |
| m: role R { method foo() { say self } }; my $x = 42 but R; $x.foo | 20:34 | ||
| camelia | 42 | ||
| p6steve | yeah but (see 20:48 above) there's no method new on mixing in afaict | 20:35 | |
| is there a method that gets called on mixin "construction" | |||
| ? | |||
| Geth | ecosystem: JRaspass++ created pull request #609: Update Ed25519 URL |
20:42 | |
| ecosystem: ab4a9ba3a8 | (James Raspass)++ (committed using GitHub Web editor) | META.list Update Ed25519 URL (#609) The repo has changed to from "Ed25519" to "ed25519-raku" and the default branch from "master" to "main". |
20:50 | ||
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| Xplorator | Hi. Is normal that the following regex cause a parse error? | 22:12 | |
| m: say "abcabc" ~~ / ^ <before ("abc")> /' | 22:13 | ||
| camelia | ===SORRY!=== Error while compiling <tmp> Unable to parse expression in metachar:sym<( )>; couldn't find final ')' (corresponding starter was at line 1) at <tmp>:1 ------> say "abcabc" ~~ / ^ <before ("abc")>⏏ /' expecting an… |
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| Nemokosch | not sure one is allowed to put a capture group inside a lookaround | 22:22 | |
| I for one wouldn't allow it, that's for sure 😅 | |||
| since lookarounds are parts that wouldn't belong to the matching - if you actually do want to match them, why not just... match them? | 22:23 | ||
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| Xplorator | It seems that we ARE allowed to put capture in "lookarounds" though | 22:30 | |
| m: say "abcde" ~~ / (a) <()> (b) / | |||
| camelia | ｢｣ 0 => ｢a｣ 1 => ｢b｣ |
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| Xplorator | but maybe the "<(" and ")>" forms of lookarounds are exceptions | 22:32 | |
| Also, what bugs me is not really the ability or inability to put | 22:34 | ||
| capturing groups inside <before> <after> lookarounds | |||
| What bugs me is that is we are can put them unless they are the top level thing | 22:36 | ||
| This is allowed for example say "abcabc" ~~ / ^ <before ("abc")**2> / | |||
| guifa_ | <( isn't a lookaroundl, they're just start/end anchors | 22:39 | |
| Xplorator | right, thanks for the clarification | ||
| guifa_ | Re before and after, you CAN do a capture group, but there is no way to access before/after outside of the before/after match, as the before/after isn't actually stored. Curiously, their existance is noted in gisting a Match | 22:44 | |
| m: say 'ab' ~~ /<after a> b/; | |||
| camelia | ｢b｣ after => ｢｣ |
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| Xplorator | they disappear when we do <.before> / <.after> | 22:45 | |
| I didn't express my self correctly | |||
| the troubling thing is that the error message says | 22:46 | ||
| Unable to parse expression in metachar:sym<( )>; couldn't find final ')' | |||
| while the matching right brace is clearly present | 22:47 | ||
| guifa_ | some metachar:sym<( )> are parentheses | 22:57 | |
| not <( and )> | |||
| the issue is you just need a space | |||
| m: say "abcabc" ~~ / ^ <before ("abc" )> /' | |||
| camelia | ===SORRY!=== Error while compiling <tmp> Unable to parse expression in metachar:sym<( )>; couldn't find final ')' (corresponding starter was at line 1) at <tmp>:1 ------> say "abcabc" ~~ / ^ <before ("abc" )>⏏ /' expecting a… |
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| guifa_ | err | ||
| m: say "abcabc" ~~ / ^ <before ("abc") > /' | |||
| camelia | ===SORRY!=== Error while compiling <tmp> Two terms in a row at <tmp>:1 ------> say "abcabc" ~~ / ^ <before ("abc") > /⏏' expecting any of: infix infix stopper postfix statement end … |
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| guifa_ | m: say "abcabc" ~~ / ^ <before ("abc") > / | 22:58 | |
| camelia | ｢｣ before => ｢｣ |
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| guifa_ | there we go | ||
| )> is a term in the grammar since it's just an anchor of sorts, so the parser treats it as a single entity (no different than $ or ^ ) | |||
| before (capture-group-start-token), (a), (b), (c), (end-match-anchor) ………… and then reaches the end of the string without finding the capture-group-end-token | 23:01 | ||
| Xplorator | Oh right I see | ||
| thanks | |||
| I guess this was a longest token matching thing. A lexing problem | |||
| guifa_ | Yeah. Consider * vs ** | 23:02 | |
| 5 * * ---> anon sub :: ($x) { 5 * x } | |||
| but 5 ** is "five to the power of… wait what?" | 23:03 | ||
| Xplorator | yes it it definitely the same sort of error | 23:04 | |
| could it be a new case for less than awesome error messages? | 23:05 | ||
| Nemokosch | from the user's perspective, definitely... | 23:10 | |
| guifa_ | It might be tough though, because you'd need to check over ever symbol with tighter precedence that starts with the expected end symbol. Not sure how easily that can be done, since it'd cover infixes, postfixes, prefixes, terms, etc | 23:13 | |
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