2a52f8d735
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 $_.
The lexical::underscore function returns a scalar reference to either a lexical
$_ variable somewhere up the call stack (using PadWalker magic), or to the
global $_ if there was no lexical version.
Wrapping lexical::underscore in ${ ... } dereferences the scalar reference,
allowing you to access (and even assign to) it.
WWW: http://search.cpan.org/dist/lexical-underscore/
2 lines
155 B
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2 lines
155 B
Text
SHA256 (lexical-underscore-0.001.tar.gz) = 327eca5d652627a2eda655e8c3806bf5c42af90aad56ea60cff10360548b40ed
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SIZE (lexical-underscore-0.001.tar.gz) = 49391
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