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Set by lizmat on 6 September 2022.
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tbrowder Voldenet: ref Pod::TreeWalker, pls show a useful example of an ā€œis builrā€ Listener and put it in a comment in my PR on Pod::TreeWalker 10:32
sorry, put it in the new issue i just opened there 10:37
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tbrowder lizmat: my comment to you ref source-url got lost in the ether: i said something like i don't know why skaji didn't use the META ref, but it may have been in case the PR is for an other url 11:11
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Voldenet tbrowder: readme has the example already: `Pod::TreeWalker.new( :listener($to-html) ).walk-pod($=pod);` 11:43
the difference was that listener was private 11:45
when it was `is built` 11:46
m: class X { has $.n is required; }; X.new(n=>42).n.say
camelia 42
Voldenet m: class X { has $!n is required; }; X.new(n=>42).n.say
camelia The attribute '$!n' is required, but you did not provide a value for it.
in block <unit> at <tmp> line 1
Voldenet m: class X { has $!n is required is built; }; X.new(n=>42).n.say
camelia No such method 'n' for invocant of type 'X'
in block <unit> at <tmp> line 1
Voldenet m: class X { has $!n is required is built; }; X.new(n=>42).say
camelia X.new(n => 42)
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Voldenet it's such a tiny detail that it doesn't seem worth considering 11:53
tbrowder Voldenet: ok, i can work with those. thnx
maybe, but i can't see things as clearly and easlly as you, and so i like to show noobs as clearly as possible when possible 11:55
and i do like to see *practical* examples. remember the purpose of the module is to extract pod data which is usually much more complex 11:58
esp. when using it solely for documentation 11:59
Pod::TreeWalker is the best thing i've found for doing that 12:00
(stepping down from soap box...) 12:01
grondilu To which degree can I use type constraints in &MAIN ? I've tried with an enum defined in the same compunit and that works, but if it's imported from a module, it does not. 12:50
like: `enum coin <heads tail>; sub MAIN(coin $flip) {...}` works but not `use CoinFlips; sub MAIN(coin $flip) {...}` 12:53
eg: `raku -e 'package CoinFlip { enum coin is export <heads tail> }; import CoinFlip; sub MAIN(coin :$flip) { say $flip }' --flip=heads` 12:55
^that just prints the usage notice on my machine. 12:56
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grondilu but this prints "heads" : `raku -e 'enum coin <heads tail>; sub MAIN(coin :$flip) { say $flip }' --flip=heads` 13:08
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Voldenet docs don't say anything about enums from other packages not being usable 13:38
coranila feels like the enum is installed to late for &MAIN to find it lexically..? 13:45
,s/to/too 13:46
[Coke] m: package CoinFlip { enum coin is export <heads tail> }; import CoinFlip; say tail.value
camelia 1
coranila probably not quite right; the fact that &USAGE sees it correctly is a bit befuddling
but dispatch logic doesn't see it or we're not allomorphing in time? 13:47
m: package CoinFlip { enum coin is export <heads tails> }; import CoinFlip; BEGIN say heads.WHAT; 13:48
evalable6 (coin)
Raku eval (coin)
coranila m: package Flip { enum coin is export <heads tails>; }; import Flip; multi MAIN(:$a) { $a.WHAT.say }; multi MAIN(coin(Str) :$a) { say $a }; MAIN(a => 'heads' 13:54
evalable6 (exit code 1) ===SORRY!=== Error while compilinā€¦
coranila, Full output: gist.github.com/82185ff9a904e7281a...c752a758a9
Raku eval Exit code: 1 ===SORRY!=== Error while compiling /home/glot/main.raku Unable to parse expression in argument list; couldn't find final ')' (corresponding starter was at line 1) at /home/glot/main.raku:1 ------> (Str) :$a) { say $a }; MAIN(a => 'heads'ā<EOL> expecting any of: postfix
coranila hrng
m: package Flip { enum coin is export <heads tails>; }; import Flip; multi MAIN(:$a) { $a.WHAT.say }; multi MAIN(coin(Str) :$a) { say $a }; MAIN(a => 'heads')
Raku eval (Str) (Any)
evalable6 (Str)
(Any)
coranila yeah, that does seem like we don't notice we could promote the Str; behavior is the same with bare coin as parameter type instead of coercive from Str 13:56
gist.github.com/crnlskn/40e8601896...953bd7173a # as per the wild guess above 14:19
not sure how to fix it though; conceptually I'd think we could defer type resolution, but how to implement that I don't know!
timo i'm sure there's something we have for that actually 14:21
we do have COERCE don't we? 14:22
coranila timo: the issue is when importing the enum vs declaring it in the same file 14:23
timo oh!
coranila ,s/file/scope
timo yeah sorry i hadn't read backscroll yet
coranila all good, helps me make sure i did poke at the right thing :-)
timo sounds like a straight-up rakudobug
coranila grondilu++ found it.. :-) 14:24
i'll keep it in mind and file it this evening if no one else is more eager 14:25
might also see if/how COERCE could help, but that's a bit in the future! 14:26
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Xliff If I want to have a regex search for the keys in a hash, what is the best way to do that? 14:48
timo you mean the regex should accept things that are keys in the given hash, not use a regex to go through the keys of a hash to find one or more matching keys? 14:50
Xliff m: my %h = ( a => 1, b => 2, c => 3); say "cde" ~~ /%h/ 14:51
camelia ===SORRY!=== Error while compiling <tmp>
The use of hash variables in regexes is reserved
at <tmp>:1
------> => 1, b => 2, c => 3); say "cde" ~~ /%h<HERE>/
Xliff m: my %h = ( a => 1, b => 2, c => 3); say "cde" ~~ /<%h>/ 14:52
camelia Nil
Xliff m: my %h = ( a => 1, b => 2, c => 3); say "cde" ~~ /<%h.keys>/
camelia ===SORRY!=== Error while compiling <tmp>
Unable to parse expression in metachar:sym<assert>; couldn't find final '>' (corresponding starter was at line 1)
at <tmp>:1
------> => 1, b => 2, c => 3); say "cde" ~~ /<%h<HERE>.keys>/
Xliff m: my %h = ( a => 1, b => 2, c => 3); say "cde" ~~ /@( %h.keys )/
camelia ļ½¢cļ½£
timo m: my %foo = <a b c d e f g h>; say "hello there how are you" ~~ m:ex/ @(%foo.keys) /
camelia (ļ½¢eļ½£ ļ½¢eļ½£ ļ½¢eļ½£ ļ½¢aļ½£ ļ½¢eļ½£)
lizmat Xliff: perhaps raku.land/zef:lizmat/Map::Match ? 15:01
Xliff lizmat: Nah. I'm keeping it simple. 15:07
timo++ (and lizmat++)
librasteve holy cow - that Map::Match is a mind bender 15:10
;-)
antononcube @librasteve Well, lizmat has been "pushing" "Map::Match" as a solution before. I still have to think how to be used for emojis retrieval... 15:19
lizmat antononcube what do you want to use as search key for an emoji such as šŸ‘ ? 15:22
antononcube "wind direction check" 15:29
lizmat hmmm... so "wind direction check" => "šŸ‘" in a hash ? 15:35
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lizmat antononcube so "wind direction check" => "šŸ‘" in a hash ? 15:35
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antononcube @lizmat I was joking for the "wind direction." The use of "Map::Match" was suggested by you at some point when discussing the emojis package. 16:33
lizmat I was just thinking along... trying to get to a solution 16:35
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tbrowder lizmat: cool! i see you did make Pod::TreeWalker "is required" yay 22:32
wayland76 grondilu: Regarding MAIN, one of the things I'm working on in the background is an optional replacement for MAIN that's a bit more complex in some ways. The concept is that you run "<executable> <command> <object>" on the command line, and then in the code, you define a bunch of objects with methods, and the methods are exported as the commands. It may be a while though. 22:38
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