XML::Li...::RegExp(3)

✨ XML::LibXML::RegExp ✨

okay so bestie, welcome to XML::LibXML::RegExp 💖 — it's your lil gateway to libxml2's very own regular expression engine. No cap, this is a Perl interface to libxml2's implementation of regexes, and you'll catch it doing the most for validation of XML Schema simple types (hi, pattern facet 👋). Periodt.

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🌸 SYNOPSIS 🌸

use XML::LibXML;
my $compiled_re = XML::LibXML::RegExp->new('[0-9]{5}(-[0-9]{4})?');
if ($compiled_re->isDeterministic()) { ... }
if ($compiled_re->matches($string)) { ... }

$compiled_re = XML::LibXML::RegExp->new( $regexp_str );
$bool = $compiled_re->matches($string);
$bool = $compiled_re->isDeterministic();

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🦋 DESCRIPTION 🦋

So basically: this is a perl interface to libxml2's implementation of regular expressions. Those regexes get used, like, for validation of XML Schema simple types — specifically the pattern facet. It's giving ✨validator energy✨.

💜 new()

$compiled_re = XML::LibXML::RegExp->new( $regexp_str );

The constructor takes a string containing a regular expression and hands you back a compiled regexp object. Slay. You fed it a string, it feeds you a whole object. 💅

🎀 matches($string)

$bool = $compiled_re->matches($string);

You give it a string value, and it returns a true value if that value is matched by the compiled regular expression. That's it, that's the whole vibe check. 🫶

🌈 isDeterministic()

$bool = $compiled_re->isDeterministic();

Returns a true value if the regular expression is deterministic; returns false otherwise. And if you're sitting there like "bestie what does deterministic even mean 😭" — the definition of determinism lives in the XML spec, right here: <http://www.w3.org/TR/REC-xml/#determinism> 👑

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👑 AUTHORS 👑

Matt Sergeant, Christian Glahn, Petr Pajas — the iconique trio fr fr 🌟

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⭐ VERSION ⭐

2.0213

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💖 COPYRIGHT 💖

• 2001-2007, AxKit.com Ltd.
• 2002-2006, Christian Glahn.
• 2006-2009, Petr Pajas.

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🍓 LICENSE 🍓

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. iykyk 🌸

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and that's the whole page bestie, you ate it up 💅 no crumbs left, literally.

perl v5.42.2 · 2026-05-25 — mwah, go forth and compile some regexes 🧚✨💜