... copying every field in the object by hand to the new object.

Maybe (untested): 

use Scalar::Util qw(blessed);

sub clone {
    
    my $self = shift;
    
    my $clone = blessed($self)->new or die "clone failed ($self)";
    
    @{$clone}{keys %$self} = (values %$self);
    
    return $clone;

    }

[download]
Of course, this is still essentially "copying by hand" with lotsa potential pitfalls.

Give a man a fish:  <%-(-(-(-<

In reply to Re^3: How can one change the keys of a hash to an alternative set of keys? by AnomalousMonk
in thread How can one change the keys of a hash to an alternative set of keys? by tkguifan

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