autodie::Scope::GuardStack - Online Linux Manual PageSection : 3
Updated : 2020-06-14
Source : perl v5.32.0
Note : Perl Programmers Reference Guide

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NAMEautodie::Scope::GuardStack − Hook stack for managing scopes via %^H

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SYNOPSIS​ use autodie::Scope::GuardStack; ​ my $stack = autodie::Scope::GuardStack−>new ​ $^H{'my−key'} = $stack; ​ ​ $stack−>push_hook(sub {});

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DESCRIPTIONThis class is a stack of hooks to be called in the right order as scopes go away. The stack is only useful when inserted into %^H and will pop hooks as their ‟scope” is popped. This is useful for uninstalling or reinstalling subs in a namespace as a pragma goes out of scope. Due to how %^H works, this class is only useful during the compilation phase of a perl module and relies on the internals of how perl handles references in %^H. This module is not a part of autodie's public API.

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Methodsnew ​ my $stack = autodie::Scope::GuardStack−>new; Creates a new autodie::Scope::GuardStack. The stack is initially empty and must be inserted into %^H by the creator. push_hook ​ $stack−>push_hook(sub {}); Add a sub to the stack. The sub will be called once the current compile-time ‟scope” is left. Multiple hooks can be added per scope

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AUTHORCopyright 2013, Niels Thykier <niels@thykier.net>

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LICENSEThis module is free software. You may distribute it under the same terms as Perl itself. 0

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Johanes Gumabo

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