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This channel is intended for people just starting with the Raku Programming Language (raku.org). Logs are available at irclogs.raku.org/raku-beginner/live.html Set by lizmat on 8 June 2022. |
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| habere-et-disper | In trying to simplify: | 10:13 | |
| for @array -> $character { | |||
| given $character { | |||
| when ... | |||
| } | |||
| } | |||
| I thought this would work: | |||
| for @array -> $character { | |||
| when ... | |||
| } | |||
| But `when` needs a `given`. So maybe: | |||
| forgiven @array -> $character { | |||
| when ... | |||
| } | |||
| I thought it -Ofun to see `forgiven`! :-) | 10:14 | ||
| (Or maybe `when` should not only take from the topic?) | 10:17 | ||
| kjp | Try plain "for @array { when ... } | 10:18 | |
| habere-et-disper | I did and that works as expected, but I wanted to name the topic. | 10:23 | |
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| kjp | But "when" operates on $_, so even if you call it something else you'll still need "given" to get back to $_. | 10:25 | |
| habere-et-disper | So either `when` could be tempted to take from more than just the topic or we could entertain the -Ofun idea of `forgiven` ? | 10:26 | |
| Nahita | :pp forgiven would be so cool! | 10:39 | |
| BTW, `when` doesn't *need* `given` but they are used frequently i guess to emulate a (powerful) switch-case of other langs | |||
| maybe you can do `$_ = $character` or vice versa at the beginning of the loop but... that's not nearly as cool as `forgiven` | |||
| habere-et-disper | Can we locally extend `for` or `given` and create the keyword `forgiven` without much fuss or is this straight into the weeds? | 10:42 | |
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| lizmat | you could | 11:18 | |
| guifa | You could do it now with a slang, but (and I swear I feel like I'm a broken record with this) when rakuAST comes out it'll be easy as pie | 11:26 | |
| basically you'd convert forgiven @foo -> $bar { … } to for @foo -> $bar { $_ := $bar; … } | 11:27 | ||
| (or for @foo { my $bar := $_; … }; classic six half a dozen thing) | 11:28 | ||
| Nahita | is it possible you show an example of that or point to where similar thing is made please? | 11:29 | |
| habere-et-disper | Sounds wonderful. Where are the roast stats? It is good to see progress. :-) | ||
| guifa | blogs.perl.org/users/damian_conway/...ratch.html <-- closest example I can think of off the top of my head, but it's simpler than the proposed | 11:30 | |
| Nahita | thankyou | 11:33 | |
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| guifa | tbh what might be more interesting is allowing for a twigil that marks something as a topic. so you'd be able to do for @foo -> $_bar { … } and then a .xyz would be called on $bar, but you could still use $bar as its self (maybe for nicer argument passing via :$bar ) | 11:36 | |
| lizmat | that feels... like a good idea now, but... | ||
| guifa | lizmat: I will find a way :-) | 11:38 | |
| Obviously, _ is out, since $_foo is a valid identifier | |||
| Nemokosch | I don't know | 11:39 | |
| `for @array -> $character { | |||
| when $character ~~ check {` | |||
| what is the matter with this? | |||
| seems to me that this is exactly the intended use-case of smartmatch | 11:40 | ||
| lizmat | agree | 11:41 | |
| guifa | laziness? ha I admit I've one or two times where I've had the situation I described (wanting to do .calls but also :$args ) and unfortunately in a for loop, you get .calls with foo @foo { … } and you get :$args with for @foo -> $args { … } but you can't get both | 11:43 | |
| 'tis but a minor annoyance, but I mean, are we really former Perlmongers if we don't grumble over minor annoyances? hahahha | 11:44 | ||
| Nemokosch | guifa: oh I hadn't made it to your example when I wrote that | 11:48 | |
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| I was responding to the original "when without given inside a for" topic | 11:49 | ||
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| nd3i | I'm having trouble getting either raku-debug or rakudo-debug to load my code. While raku -c myfile.raku shows no errors, raku-debug dies with: | 17:12 | |
| Unexpected structure of 'when' statement QAST node: | |||
| - QAST::Op(if) :when_block<?> :statement_id<35> when \"raw\" { }\n\t | |||
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| lizmat | oh dear | 17:37 | |
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