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For t/test-parsing
  Run on Sun Nov 14 09:49:57 2010
Reported on Sun Nov 14 09:50:07 2010

File /usr/local/lib/perl/5.10.0/Moose/Meta/Method/Delegation.pm
Statements Executed 19
Total Time 0.0008446 seconds
Subroutines — ordered by exclusive time
Calls P F Exclusive
Time
Inclusive
Time
Subroutine
0000s0sMoose::Meta::Method::Delegation::::BEGINMoose::Meta::Method::Delegation::BEGIN
0000s0sMoose::Meta::Method::Delegation::::__ANON__[:109]Moose::Meta::Method::Delegation::__ANON__[:109]
0000s0sMoose::Meta::Method::Delegation::::_get_delegate_accessorMoose::Meta::Method::Delegation::_get_delegate_accessor
0000s0sMoose::Meta::Method::Delegation::::_initialize_bodyMoose::Meta::Method::Delegation::_initialize_body
0000s0sMoose::Meta::Method::Delegation::::_newMoose::Meta::Method::Delegation::_new
0000s0sMoose::Meta::Method::Delegation::::associated_attributeMoose::Meta::Method::Delegation::associated_attribute
0000s0sMoose::Meta::Method::Delegation::::curried_argumentsMoose::Meta::Method::Delegation::curried_arguments
0000s0sMoose::Meta::Method::Delegation::::delegate_to_methodMoose::Meta::Method::Delegation::delegate_to_method
0000s0sMoose::Meta::Method::Delegation::::newMoose::Meta::Method::Delegation::new
LineStmts.Exclusive
Time
Avg.Code
1
2package Moose::Meta::Method::Delegation;
3
4328µs9µsuse strict;
# spent 10µs making 1 call to strict::import
5334µs11µsuse warnings;
# spent 28µs making 1 call to warnings::import
6
7330µs10µsuse Carp 'confess';
# spent 51µs making 1 call to Exporter::import
8364µs21µsuse Scalar::Util 'blessed', 'weaken';
# spent 48µs making 1 call to Exporter::import
9
101800ns800nsour $VERSION = '1.15';
11127µs27µs$VERSION = eval $VERSION;
121700ns700nsour $AUTHORITY = 'cpan:STEVAN';
13
14use base 'Moose::Meta::Method',
# spent 142µs making 1 call to base::import
153656µs219µs 'Class::MOP::Method::Generated';
16
17
18sub new {
19 my $class = shift;
20 my %options = @_;
21
22 ( exists $options{attribute} )
23 || confess "You must supply an attribute to construct with";
24
25 ( blessed( $options{attribute} )
26 && $options{attribute}->isa('Moose::Meta::Attribute') )
27 || confess
28 "You must supply an attribute which is a 'Moose::Meta::Attribute' instance";
29
30 ( $options{package_name} && $options{name} )
31 || confess
32 "You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT";
33
34 ( $options{delegate_to_method} && ( !ref $options{delegate_to_method} )
35 || ( 'CODE' eq ref $options{delegate_to_method} ) )
36 || confess
37 'You must supply a delegate_to_method which is a method name or a CODE reference';
38
39 exists $options{curried_arguments}
40 || ( $options{curried_arguments} = [] );
41
42 ( $options{curried_arguments} &&
43 ( 'ARRAY' eq ref $options{curried_arguments} ) )
44 || confess 'You must supply a curried_arguments which is an ARRAY reference';
45
46 my $self = $class->_new( \%options );
47
48 weaken( $self->{'attribute'} );
49
50 $self->_initialize_body;
51
52 return $self;
53}
54
55sub _new {
56 my $class = shift;
57 my $options = @_ == 1 ? $_[0] : {@_};
58
59 return bless $options, $class;
60}
61
62sub curried_arguments { (shift)->{'curried_arguments'} }
63
64sub associated_attribute { (shift)->{'attribute'} }
65
66sub delegate_to_method { (shift)->{'delegate_to_method'} }
67
68sub _initialize_body {
69 my $self = shift;
70
71 my $method_to_call = $self->delegate_to_method;
72 return $self->{body} = $method_to_call
73 if ref $method_to_call;
74
75 my $accessor = $self->_get_delegate_accessor;
76
77 my $handle_name = $self->name;
78
79 # NOTE: we used to do a goto here, but the goto didn't handle
80 # failure correctly (it just returned nothing), so I took that
81 # out. However, the more I thought about it, the less I liked it
82 # doing the goto, and I preferred the act of delegation being
83 # actually represented in the stack trace. - SL
84 # not inlining this, since it won't really speed things up at
85 # all... the only thing that would end up different would be
86 # interpolating in $method_to_call, and a bunch of things in the
87 # error handling that mostly never gets called - doy
88 $self->{body} = sub {
89 my $instance = shift;
90 my $proxy = $instance->$accessor();
91
92 my $error
93 = !defined $proxy ? ' is not defined'
94 : ref($proxy) && !blessed($proxy) ? qq{ is not an object (got '$proxy')}
95 : undef;
96
97 if ($error) {
98 $self->throw_error(
99 "Cannot delegate $handle_name to $method_to_call because "
100 . "the value of "
101 . $self->associated_attribute->name
102 . $error,
103 method_name => $method_to_call,
104 object => $instance
105 );
106 }
107 unshift @_, @{ $self->curried_arguments };
108 $proxy->$method_to_call(@_);
109 };
110}
111
112sub _get_delegate_accessor {
113 my $self = shift;
114 my $attr = $self->associated_attribute;
115
116 # NOTE:
117 # always use a named method when
118 # possible, if you use the method
119 # ref and there are modifiers on
120 # the accessors then it will not
121 # pick up the modifiers too. Only
122 # the named method will assure that
123 # we also have any modifiers run.
124 # - SL
125 my $accessor = $attr->has_read_method
126 ? $attr->get_read_method
127 : $attr->get_read_method_ref;
128
129 $accessor = $accessor->body if Scalar::Util::blessed $accessor;
130
131 return $accessor;
132}
133
13414µs4µs1;
135
136__END__
137
138=pod
139
140=head1 NAME
141
142Moose::Meta::Method::Delegation - A Moose Method metaclass for delegation methods
143
144=head1 DESCRIPTION
145
146This is a subclass of L<Moose::Meta::Method> for delegation
147methods.
148
149=head1 METHODS
150
151=over 4
152
153=item B<< Moose::Meta::Method::Delegation->new(%options) >>
154
155This creates the delegation methods based on the provided C<%options>.
156
157=over 4
158
159=item I<attribute>
160
161This must be an instance of C<Moose::Meta::Attribute> which this
162accessor is being generated for. This options is B<required>.
163
164=item I<delegate_to_method>
165
166The method in the associated attribute's value to which we
167delegate. This can be either a method name or a code reference.
168
169=item I<curried_arguments>
170
171An array reference of arguments that will be prepended to the argument list for
172any call to the delegating method.
173
174=back
175
176=item B<< $metamethod->associated_attribute >>
177
178Returns the attribute associated with this method.
179
180=item B<< $metamethod->curried_arguments >>
181
182Return any curried arguments that will be passed to the delegated method.
183
184=item B<< $metamethod->delegate_to_method >>
185
186Returns the method to which this method delegates, as passed to the
187constructor.
188
189=back
190
191=head1 BUGS
192
193See L<Moose/BUGS> for details on reporting bugs.
194
195=head1 AUTHOR
196
197Dave Rolsky E<lt>autarch@urth.orgE<gt>
198
199=head1 COPYRIGHT AND LICENSE
200
201Copyright 2009 by Infinity Interactive, Inc.
202
203L<http://www.iinteractive.com>
204
205This library is free software; you can redistribute it and/or modify
206it under the same terms as Perl itself.
207
208=cut