Call an anon sub as it is destroyed. (Typically by going
out of scope.) For instance:
use strict;
use Cwd;
use Carp;
use ReleaseAction;
sub cd_to {
chdir($_[0]) or confess("Cannot chdir to '$_[0]': $!");
}
sub temp_cd {
my $cwd = cwd();
cd_to(shift);
return ReleaseAction->new( sub {cd_to($cwd);} );
}
# And a simple test
system "pwd";
{
my $var = temp_cd('/tmp');
system "pwd";
}
system "pwd";
package ReleaseAction;
# Pass this a sub...
sub new {
bless($_[1], $_[0]);
}
# and call it when it goes.
sub DESTROY {
shift->();
}
1;
