autodie::Scope::GuardStack(3pm) Perl Programmers Reference Guide
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 <niels@thykier.net>
LICENSE
This module is free software. You may distribute it under the same
terms as Perl itself.
perl v5.38.2 2023-11-28 autodie::Scope::GuardStack(3pm)
perl 5.38.2 - Generated Sun Dec 15 10:44:32 CST 2024