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( #3333=superdoc: print w/replies, xml ) Need Help??
Yes, a wrapper with overloaded numeric comparison seems to work:
#!/usr/bin/perl use warnings; use strict; use feature qw{ say }; { package Element; use Moo; has name => (is => 'ro'); } { package Element::Wrapped; use Moo; use overload '==' => sub { $_[0]->element == $_[1]->element }, fallback => 1; has element => (is => 'ro', required => 1, handles => [qw[ name ]]); # <- and any other Elem +ent methods. has active_container => (is => 'rw'); } { package Container; use Moo; has elements => (is => 'ro', default => sub { [] }); sub add_elem { my ($self, $element) = @_; push @{ $self->elements }, $element unless grep $_ == $element, @{ $self->elements }; } sub get_elem { my ($self, $name) = @_; my $elem = (grep $_->name eq $name, @{ $self->elements })[0]; my $wrap = 'Element::Wrapped'->new(element => $elem); $wrap->active_container($self); return $wrap } } use Test2::V0; plan 6; my $elem1 = 'Element'->new(name => 'one'); my ($cont1, $cont2) = map 'Container'->new, 1, 2; $cont1->add_elem($elem1); $cont2->add_elem($elem1); is $cont1->get_elem('one')->active_container, $cont1; is $cont2->get_elem('one')->active_container, $cont2; my $e1 = $cont1->get_elem('one'); my $e2 = $cont2->get_elem('one'); ok $e1->active_container != $e2->active_container; ok $e1 == $e2; is $e1->name, 'one'; is $e1->name, $e2->name;
map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re^3: OO Pattern Container x Elements and Method Chaining by choroba
in thread OO Pattern Container x Elements and Method Chaining by LanX

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