Hello roman,

One way to get the desired behaviour is to change the argument to Scope::Guard->new() from an anonymous code reference (i.e., a closure) into a reference to a named sub:

#! perl
use strict;
use warnings;
use Scope::Guard;

my $x;
my $code = do {
    my $g;
    sub { $g = Scope::Guard->new(\&handler); };
};

$code->();
undef $code;
warn "end";

sub handler
{
    warn "destroyed";
    $x;
}

[download]

which outputs:

destroyed at /tmp/sample.pl line 18.
end at /tmp/sample.pl line 14.

[download]

as desired. I’m not sure why this is, but I suspect it has to do with the “deep magic” Perl uses to implement closures.

HTH,

Athanasius <°(((>< contra mundum

In reply to Re: Reference to guard not released by Athanasius
in thread Reference to guard not released by roman

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