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RPM resource perl-lexical-underscore

Starting with Perl 5.10, it is possible to create a lexical version of the Perl default variable $_. Certain Perl constructs like the "given" keyword automatically use a lexical $_ rather than the global $_. It is occasionallly useful for a sub to be able to access its caller's $_ variable regardless of whether it was lexical or not. The "(_)" sub prototype is the official way to do so, however there are sometimes disadvantages to this; in particular it can only appear as the final required argument in a prototype, and there is no way of the sub differentiating between an explicitly passed argument and $_. This caused me problems with Scalar::Does, because I wanted to enable the "does" function to be called as either: does($thing, $role); does($role); # assumes $thing = $_ With "_" in the prototype, $_ was passed to the function at the end of its argument list; effectively "does($role, $thing)", making it impossible to tell which argument was the role. Enter "lexical::underscore" which allows you to access your caller's lexical $_ variable as easily as: ${lexical::underscore()} You can access lexical $_ further up the call stack using: ${lexical::underscore($level)} If you happen to ask for $_ at a level where no lexical $_ is available, you get the global $_ instead. This module does work on Perl 5.8 but as there is no lexical $_, always returns the global $_.

Found 2 sites for perl-lexical-underscore

• https://metacpan.org/release/lexical-underscore
• http://search.cpan.org/dist/lexical-underscore

Found 32 RPM for perl-lexical-underscore

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Fabrice Bellet