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AUTODIE::SCOPE::GUARDSTACK - reference manual online

Hook stack for managing scopes via %^H.

Chapter
2015-12-25
autodie::Scope::GuardStack(3pm)User Contributed Perl Documentationautodie::Scope::GuardStack(3pm)

NAME autodie::Scope::GuardStack - Hook stack for managing scopes via %^H
SYNOPSIS use autodie::Scope::GuardStack; my $stack = autodie::Scope::GuardStack->new $^H{'my-key'} = $stack; $stack->push_hook(sub {});
DESCRIPTION This 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. Methods new 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
AUTHOR Copyright 2013, Niels Thykier <@thykier.net>
LICENSE This module is free software. You may distribute it under the same terms as Perl itself.
perl v5.22.1 2015-12-25 autodie::Scope::GuardStack(3pm)