Guard Safe cleanup blocks
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Perl module perl guard objects cleanup blocks guard objects

Guard Description

Safe cleanup blocks Guard is a Perl module that implements so-called "guards". A guard is something (usually an object) that "guards" a resource, ensuring that it is cleaned up when expected.Specifically, this module supports two different types of guards: guard objects, which execute a given code block when destroyed, and scoped guards, which are tied to the scope exit.SYNOPSIS use Guard; # temporarily chdir to "/etc" directory, but make sure # to go back to "/" no matter how myfun exits: sub myfun { scope_guard { chdir "/" }; chdir "/etc"; code_that_might_die_or_does_other_fun_stuff; } # create an object that, when the last reference to it is gone, # invokes the given codeblock: my $guard = guard { print "destroyed! " }; undef $guard; # probably destroyed here Requirements: · Perl

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