|
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. |
|||
|
00:00
hexology left,
yjh left,
deadmarshal_ left,
lucs left,
elcaro left,
sjn left,
sjn joined
00:02
hexology joined
00:05
lucs joined,
elcaro joined
00:06
deadmarshal_ joined
03:15
kjp left
04:22
MasterDuke left
07:13
deoac left
07:54
dakkar joined
08:04
Manifest0 joined
08:21
tea3po joined
08:22
tea3po left,
tea3po joined
08:24
teatwo left
08:35
ab5tract left,
ab5tract joined
|
|||
| lizmat | And yet another Rakudo Weekly News hits the Net: rakudoweekly.blog/2023/09/11/2023-37-issuing/ | 12:05 | |
|
12:56
deoac joined
14:16
camelia left
14:36
camelia joined
15:14
deoac left
15:30
deoac joined
16:36
dakkar left
17:21
deoac left
17:50
jgaz left
|
|||
| timemelon | I'm trying to pass a list to a function and I think I'm messing up the implicit parenthesizing somehow | 18:01 | |
| I have sub f(List:D @ints) { # ... } | |||
| and say f (1, 1, 2, 2, 2, 3); | |||
| I'm getting the error Type check failed in binding to parameter '@ints'; expected Positional[List] but got List ((1, 1, 2, 2, 2, 3)) | 18:02 | ||
| where am I going wrong? | 18:03 | ||
| lakmatiol | @timemelonSee docs.raku.org/language/traps#Typed...parameters | 18:15 | |
| timemelon | ah thanks | 18:20 | |
| so the type of an @ variable refers to the type of each element | |||
| lakmatiol | yes | 18:23 | |
|
19:06
MasterDuke joined
|
|||
| nemokosch | anyway, there is "no way" a List:U could get there | 19:06 | |
| or at least it's controversial whether it should be allowed or not | 19:07 | ||
| @timemelon what languages have you used before, if I may? | 19:09 | ||
| timemelon | my big ones are c, haskell, and apl | 19:10 | |
| nemokosch | great, I know no APL and have a very basic clue of what Haskell looks like... | 19:11 | |
| I just wanted to say that something that has this @ sigil in front will violate a lot of ideas you may have about what "a variable" is | |||
| leomehraban | I have this grammer: grammar Rix{ token TOP{ <statement>*%%';' } token statement{ [<proc_call> | <expr>] } token proc_call{ '.'<identifier> '['<expr>*%%',' ']' } token identifier{ \w+ } token expr{ '+' } }. However, when I do say(Rix.parse(".print[+];"));, it just says Nil. however, when I give it ".print[];", without the plus, it gives the expected result. | 19:12 | |
| I'm still a bit confused with regexes, so it's very likely that I made some error, but I can't find it. | |||
| MasterDuke | leomehraban: moritz is the grammar/regex expert, but you might be interested in docs.raku.org/language/regexes#Til...structures to make your parsing of '[' <...> ']' easier | 19:24 | |
| nemokosch | what is this %% ? | 19:31 | |
| > To also match trailing delimiters ( a, or a,a, ), you can use %% instead of %. | 19:32 | ||
| gotcha | |||
| antononcube | %% is the same as % -- as far as I can tell. I have seen it other's people code. | ||
| And, yes, I was puzzled by it too. | 19:33 | ||
| scullucs | %% allows a trailing separator, while % does not. | 19:42 | |
| Er, like @nemokosch mentioned. | 19:43 | ||
| antononcube | @lucs Agh, good point! | ||
| nemokosch | @leomehraban don't @ me at this but I think there is a phenomenon when a quantifier asterisk hard-locks to an empty match | 19:44 | |
| also, does %% allow or mandate a trailing separator? | 19:45 | ||
| if it mandates one, the parsing should fail by all means | |||
| scullucs | I believe it allows, not mandates. | ||
| (But who cares about my beliefs, better test 🙂 ) | 19:46 | ||
| nemokosch | adding the comma after the plus did not help so that's definitely a hint | ||
| that wasn't the main issue | 19:47 | ||
| yes, there you go | |||
| <expr>+%%',' does work | |||
| MasterDuke | docs.raku.org/language/regexes#Mod...ier:_%,_%% isn't explicit about whether the trailing separator is optional or required | 19:48 | |
| nemokosch | maybe it's worth an issue | ||
| design.raku.org/S05.html says: | 19:49 | ||
| If you wish to allow the match to end after either side, use %% instead. Therefore / <ident>+ %% ',' / can match any of foo foo, foo,bar foo,bar, foo,bar,baz foo,bar,baz | |||
| I can just edit this one, rest assured | 19:52 | ||
|
19:58
Manifest0 left
|
|||
| @leomehraban let me assume that you ultimately want this to work. I can't tell you why - apparently - %% hard-locks to an empty match when that's an available option but without using it, it's simple to write something that does work | 20:03 | ||
| token proc_call{ '.'<identifier> '[' [<expr>','?]* ']' } | |||
| it can also work by simply changing [<proc_call> | <expr>] to [<proc_call> || <expr>] | 20:11 | ||
|
20:22
teatwo joined
20:25
tea3po left
20:40
deoac joined
21:14
deoac left
|
|||