Is there something wrong with Perl 5's lvalue attribute? As far as I can tell, it produces rather functional lvalue accessors: 

package Foo;
sub foo : lvalue {
  my $self = shift;
  warn "Only first argument to method foo is used" if @_ > 1;
  $self->{ foo } = shift if @_;
  $self->{ foo };
}

my $x = bless +{}, 'Foo';
$x->foo = 3;
print $x->foo, "\n";
$x->foo++;
print $x->foo, "\n";
$x->foo += 6;
print $x->foo, "\n";

__END__
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I know that user-defined functions with the lvalue attribute, in general, will give wrong results in the debugger, but that's only a problem for those weenies who use the debugger ;-) (Plus, there are good ways around this.)

the lowliest monk

In reply to Re^6: Tim O'Reilly on Perl by tlm
in thread Tim O'Reilly on Perl by fauria

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