2 package Class::MOP::Method::Wrapped;
8 use Scalar::Util 'reftype', 'blessed';
9 use Sub::Name 'subname';
11 our $VERSION = '0.02';
12 our $AUTHORITY = 'cpan:STEVAN';
14 use base 'Class::MOP::Method';
17 # this ugly beast is the result of trying
18 # to micro optimize this as much as possible
19 # while not completely loosing maintainability.
20 # At this point it's "fast enough", after all
21 # you can't get something for nothing :)
22 my $_build_wrapped_method = sub {
23 my $modifier_table = shift;
24 my ($before, $after, $around) = (
25 $modifier_table->{before},
26 $modifier_table->{after},
27 $modifier_table->{around},
29 if (@$before && @$after) {
30 $modifier_table->{cache} = sub {
31 $_->(@_) for @{$before};
33 ((defined wantarray) ?
35 (@rval = $around->{cache}->(@_))
37 ($rval[0] = $around->{cache}->(@_)))
39 $around->{cache}->(@_));
40 $_->(@_) for @{$after};
41 return unless defined wantarray;
42 return wantarray ? @rval : $rval[0];
45 elsif (@$before && !@$after) {
46 $modifier_table->{cache} = sub {
47 $_->(@_) for @{$before};
48 return $around->{cache}->(@_);
51 elsif (@$after && !@$before) {
52 $modifier_table->{cache} = sub {
54 ((defined wantarray) ?
56 (@rval = $around->{cache}->(@_))
58 ($rval[0] = $around->{cache}->(@_)))
60 $around->{cache}->(@_));
61 $_->(@_) for @{$after};
62 return unless defined wantarray;
63 return wantarray ? @rval : $rval[0];
67 $modifier_table->{cache} = $around->{cache};
74 (blessed($code) && $code->isa('Class::MOP::Method'))
75 || confess "Can only wrap blessed CODE";
76 my $modifier_table = {
86 $_build_wrapped_method->($modifier_table);
87 my $method = $class->SUPER::wrap(sub { $modifier_table->{cache}->(@_) });
88 $method->{modifier_table} = $modifier_table;
92 sub get_original_method {
94 $code->{modifier_table}->{orig};
97 sub add_before_modifier {
100 unshift @{$code->{modifier_table}->{before}} => $modifier;
101 $_build_wrapped_method->($code->{modifier_table});
104 sub add_after_modifier {
106 my $modifier = shift;
107 push @{$code->{modifier_table}->{after}} => $modifier;
108 $_build_wrapped_method->($code->{modifier_table});
113 # this is another possible canidate for
114 # optimization as well. There is an overhead
115 # associated with the currying that, if
116 # eliminated might make around modifiers
118 my $compile_around_method = sub {{
120 return $f1 unless @_;
122 push @_, sub { $f2->( $f1, @_ ) };
126 sub add_around_modifier {
128 my $modifier = shift;
129 unshift @{$code->{modifier_table}->{around}->{methods}} => $modifier;
130 $code->{modifier_table}->{around}->{cache} = $compile_around_method->(
131 @{$code->{modifier_table}->{around}->{methods}},
132 $code->{modifier_table}->{orig}->body
134 $_build_wrapped_method->($code->{modifier_table});
146 Class::MOP::Method::Wrapped - Method Meta Object to handle before/around/after modifiers
150 # ... more to come later maybe
160 =item B<wrap (&code)>
162 =item B<get_original_method>
170 =item B<add_before_modifier ($code)>
172 =item B<add_after_modifier ($code)>
174 =item B<add_around_modifier ($code)>
180 Stevan Little E<lt>stevan@iinteractive.comE<gt>
182 Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
184 =head1 COPYRIGHT AND LICENSE
186 Copyright 2006 by Infinity Interactive, Inc.
188 L<http://www.iinteractive.com>
190 This library is free software; you can redistribute it and/or modify
191 it under the same terms as Perl itself.