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package B::Hooks::EndOfScope::XS;
# ABSTRACT: Execute code after a scope finished compilation - XS implementation
use strict;
use warnings;
our $VERSION = '0.21';
use Variable::Magic 0.48 ();
use Sub::Exporter::Progressive 0.001006 -setup => {
exports => ['on_scope_end'],
groups => { default => ['on_scope_end'] },
};
my $wiz = Variable::Magic::wizard
data => sub { [$_[1]] },
free => sub { $_->() for @{ $_[1] }; () },
# When someone localise %^H, our magic doesn't want to be copied
# down. We want it to be around only for the scope we've initially
# attached ourselfs to. Merely having MGf_LOCAL and a noop svt_local
# callback achieves this. If anything wants to attach more magic of our
# kind to a localised %^H, things will continue to just work as we'll be
# attached with a new and empty callback list.
local => \undef
;
sub on_scope_end (&) {
my $cb = shift;
$^H |= 0x020000;
if (my $stack = Variable::Magic::getdata %^H, $wiz) {
push @{ $stack }, $cb;
}
else {
Variable::Magic::cast %^H, $wiz, $cb;
}
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
B::Hooks::EndOfScope::XS - Execute code after a scope finished compilation - XS implementation
=head1 VERSION
version 0.21
=head1 DESCRIPTION
This is the implementation of L<B::Hooks::EndOfScope> based on
L<Variable::Magic>, which is an XS module dependent on a compiler. It will
always be automatically preferred if L<Variable::Magic> is available.
=head1 FUNCTIONS
=head2 on_scope_end
on_scope_end { ... };
on_scope_end $code;
Registers C<$code> to be executed after the surrounding scope has been
compiled.
This is exported by default. See L<Sub::Exporter> on how to customize it.
=head1 SUPPORT
Bugs may be submitted through L<the RT bug tracker|https://rt.cpan.org/Public/Dist/Display.html?Name=B-Hooks-EndOfScope>
(or L<bug-B-Hooks-EndOfScope@rt.cpan.org|mailto:bug-B-Hooks-EndOfScope@rt.cpan.org>).
=head1 AUTHORS
=over 4
=item *
Florian Ragwitz <rafl@debian.org>
=item *
Peter Rabbitson <ribasushi@cpan.org>
=back
=head1 COPYRIGHT AND LICENCE
This software is copyright (c) 2008 by Florian Ragwitz.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
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