1 package Mouse::Meta::Method::Delegation;
2 use Mouse::Util qw(:meta); # enables strict and warnings
5 sub _generate_delegation{
6 my (undef, $attr, $handle_name, $method_to_call) = @_;
9 if(ref($method_to_call) eq 'ARRAY'){
10 ($method_to_call, @curried_args) = @{$method_to_call};
13 # If it has a reader, we must use it to make method modifiers work
14 my $reader = $attr->get_read_method() || $attr->get_read_method_ref();
16 my $can_be_optimized = $attr->{_mouse_cache_method_delegation_can_be_optimized};
18 if(!defined $can_be_optimized){
19 my $tc = $attr->type_constraint;
20 $attr->{_mouse_cache_method_delegation_can_be_optimized} =
21 (defined($tc) && $tc->is_a_type_of('Object'))
22 && ($attr->is_required || $attr->has_default || $attr->has_builder)
23 && ($attr->is_lazy || !$attr->has_clearer);
26 if($can_be_optimized){
27 # need not check the attribute value
29 return shift()->$reader()->$method_to_call(@curried_args, @_);
33 # need to check the attribute value
36 my $proxy = $instance->$reader();
38 my $error = !defined($proxy) ? ' is not defined'
39 : ref($proxy) && !Scalar::Util::blessed($proxy) ? qq{ is not an object (got '$proxy')}
42 $instance->meta->throw_error(
43 "Cannot delegate $handle_name to $method_to_call because "
49 $proxy->$method_to_call(@curried_args, @_);
60 Mouse::Meta::Method::Delegation - A Mouse method generator for delegation methods
64 This document describes Mouse version 0.76
68 L<Moose::Meta::Method::Delegation>