Re^5: How to know that a regexp matched, and get its capture groups?


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Re^5: How to know that a regexp matched, and get its capture groups?

by LanX (Saint)

on Jan 10, 2023 at 12:24 UTC ( [id://11149484]=note: print w/replies, xml )

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in reply to Re^4: How to know that a regexp matched, and get its capture groups?
in thread How to know that a regexp matched, and get its capture groups?

OK, I thought this performance issue was resolved for versions newer than 10-15 years.

Anyway

${^MATCH}
This is similar to $& ($MATCH) except that it does not incur the perfo
+rmance penalty associated with that variable.

This variable was added in Perl v5.10.0.
[download]

though I don't understand the /p comment

Cheers Rolf
_{(addicted to the 𐍀𐌴𐍂𐌻 Programming Language :)

Wikisyntax for the Monastery}

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Re^6: How to know that a regexp matched, and get its capture groups? by choroba (Cardinal) on Jan 10, 2023 at 12:30 UTC
If you want ${^MATCH} to work in pre-5.20, you need to use /p, which imposes the performance penalty only on the marked regex. On 5.20+, /p is a noop and ${^MATCH} works always, plus all the performance penalties are gone (not tested by me). `map{substr$_->[0],$_->[1]\|\|0,1}[\\|\|{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^ARGV,3]`	[reply] [d/l]

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