Perldelta – what is new for Perl v5.44.0

12 days ago

Perl v5.44.0 introduces named parameters in subroutine signatures, allowing parameters to be passed by name/value pairs.
Multi-variable foreach loops can now use aliased references, combining reference aliases with multiple iteration variables.
Enhanced /xx regular expression modifier allows bracketed character classes to extend across multiple lines and contain comments.
Unicode 17.0 support is added, and PRNG seeding now uses getentropy() system call for improved entropy sourcing.
Multiple security vulnerabilities fixed, including buffer overflows in Perl_study_chunk, S_measure_struct, and regex trie optimization.
Unicode rules are now fully enforced on identifiers and regex group names, disallowing characters that match \w but not XID properties.
Deprecations include using goto to jump into loops and unescaped # or vertical space in /xx bracketed character classes.
Performance enhancements include faster integer arithmetic and hash population from constant key/value pairs.
Many core modules updated, including Archive::Tar, Encode, and IO::Compress, with security fixes for several CVEs.
Documentation improvements, new diagnostics, and internal API changes, such as new functions for numeric comparison and UTF-8 handling.

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