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| Manifest0 | How do i get the capture of an interpolated regular expression? | 19:11 | |
| my $reg = "'o' (.*?) 'l'" ; "old" ~~ /<$reg>/ | |||
| it matches but $0 is Nil | 19:12 | ||
| librasteve | m: my regex reg {'o' (.*?) 'd'} ; "old" ~~ /<reg>/; say ~$/<reg>[0] | 19:32 | |
| Raku eval | l | ||
| librasteve | coupla hints | 19:33 | |
| use keyword regex and a {} block (no $ on the name) | 19:34 | ||
| I recommend dd $/ to look at your match object | |||
| then you can dereference the bit you want here $/<reg>[0] and stringify it with ~ | 19:35 | ||
| m: my regex reg {'o' (.*?) 'd'} ; "old" ~~ /<reg>/; say $<reg>[0] | 19:36 | ||
| Raku eval | ｢l｣ | ||
| librasteve | my regex reg {'o' (.*?) 'd'} ; "old" ~~ /<reg>/; say ~$<reg>[0] | ||
| Manifest0 | i have the regexes in a file, and then i'm reading them with $file.IO.lines | 19:37 | |
| and i need to check if those regex match, that's why i have them in a var | |||
| librasteve | okaaay - what happens if you put them in a regular $var and just put that in the block? like my regex {$var}; ? | 19:40 | |
| Manifest0 | for 'regexes'.IO.lines() -> $r {my $rgp = rx {<$r>}; "odd" ~~ $rgp; say $0} | 19:41 | |
| Nil | |||
| if i do dd $/ i get: $/ = Match.new(:orig("odd"), :from(0), :pos(2)) | 19:42 | ||
| changing "my $rgp = rx {<$r>};" to "my $rgp = rx {$r};" doesn't work at all | 19:45 | ||
| librasteve | lemme check the docs | 19:47 | |
| docs.raku.org/syntax/Regex%20Interpolation | |||
| Manifest0 | there's no example where captures are used :-( | 19:51 | |
| librasteve | sorry - im in the middle of cooking/eating dinner ... back in a while | 20:01 | |
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| ok - fwiw I have tried eg found this stackoverflow.com/questions/651449...ted-regex, but - like you - I have drawn a blank | 21:14 | ||
| looks like will have to fall back to eval | 21:15 | ||
| sorry I was unable to help - another option would be to post your question on StackOverflow [raku] tag ... I know that raiph is still pretty active and he has a better handle on this than I do | 21:32 | ||
| I need to hit the sack - but will try to check in tomorrow (eg if you need any help on the eval approach) | 21:33 | ||
| &afk | |||
| Manifest0 | librasteve_: thanks | 21:42 | |
| with a named capture it works: for 'regexes'.IO.lines() -> $r {my $rgp = rx {<test=$r>}; "odd" ~~ $rgp; say $<test>[0]} | 21:55 | ||
| librasteve | oh - dang - I tried this my $reg = q|'o' (.*?) 'd'|; "old" ~~ /(<$reg>)/; which failed ... but you seem to have cracked the code!!! | 22:25 | |
| but since you have that going now, maybe for 'regexes'.IO.lines() -> $r {my $rgp = rx {(<$r>)}; "odd" ~~ $rgp; say $<r>[0]} this will work? curious... | 22:29 | ||
| Manifest0 | no. it doesn't work | ||
| librasteve | ok - guess the name is the way to lift it - kudos to you | 22:30 | |
| Manifest0 | for 'regexes'.IO.lines() -> $r {my $rgp = rx {(<$r>)}; "odd" ~~ $rgp; dd $/} => $/ = Match.new(:orig("odd"), :from(0), :pos(3), :list((Match.new(:orig("odd"), :from(0), :pos(3)),))) | 22:31 | |