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Replace manual @_ shifting with stable subroutine signatures in Perl 5.36+, including defaults and slurpy parameters, with caveats for type validation.
Stop manually unpacking @_ in Perl. Learn how to use subroutine signatures to create self-documenting functions with default values and slurpy parameters.
Replace manual @_ unpacking with stable subroutine signatures in Perl 5.36, but check your interpreter version first.
Perl's subroutine signatures are stable since 5.36. Here's what they replace, how arity checking catches silent bugs, and when @_ unpacking is still the right call.
Perl 5.36 made subroutine signatures stable. They replace manual @_ unpacking with declared parameters, default values, and runtime arity checks — cutting boilerplate and catching call-site errors early. A worked config-loader example shows slurpy hashes and lazy defaults, plus the trade-offs.
Stop manually unpacking @_ in Perl. Learn how subroutine signatures automate parameter binding to reduce boilerplate and improve code readability in Perl 5.20+.
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