package Mouse::Meta::Method::Delegation; use Mouse::Util qw(:meta); # enables strict and warnings use Scalar::Util; sub _generate_delegation{ my (undef, $attr, $handle_name, $method_to_call) = @_; my @curried_args; if(ref($method_to_call) eq 'ARRAY'){ ($method_to_call, @curried_args) = @{$method_to_call}; } my $reader = $attr->get_read_method_ref(); my $can_be_optimized = $attr->{_method_delegation_can_be_optimized}; if(!defined $can_be_optimized){ my $tc = $attr->type_constraint; $attr->{_method_delegation_can_be_optimized} = (defined($tc) && $tc->is_a_type_of('Object')) && ($attr->is_required || $attr->has_default || $attr->has_builder) && ($attr->is_lazy || !$attr->has_clearer); } if($can_be_optimized){ # need not check the attribute value return sub { return shift()->$reader()->$method_to_call(@curried_args, @_); }; } else { # need to check the attribute value return sub { my $instance = shift; my $proxy = $instance->$reader(); my $error = !defined($proxy) ? ' is not defined' : ref($proxy) && !Scalar::Util::blessed($proxy) ? qq{ is not an object (got '$proxy')} : undef; if ($error) { $instance->meta->throw_error( "Cannot delegate $handle_name to $method_to_call because " . "the value of " . $attr->name . $error ); } $proxy->$method_to_call(@curried_args, @_); }; } } 1; __END__ =head1 NAME Mouse::Meta::Method::Delegation - A Mouse method generator for delegation methods =head1 VERSION This document describes Mouse version 0.50_02 =head1 SEE ALSO L =cut