It's actually rather simple.
sub IO::Handle::DESTROY {
my $deadbody = shift;
not defined fileno $deadbody
or close $deadbody
or die "Cannot close $deadbody: $!";
}
Of course, this is a global change, but that's life. You can make it
regional by putting it inside a local setting:
{
local *IO::Handle::DESTROY = sub { ... };
{
open my $fh, "...";
...
} # will trigger here
}
The nested parens here ensure that the handle is destroyed before the local
sub assignment goes out of scope.
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