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1 | package # hide me from PAUSE |
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2 | next; |
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3 | |
4 | use strict; |
5 | use warnings; |
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6 | no warnings 'redefine'; # for 00load.t w/ core support |
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7 | |
8 | use Scalar::Util 'blessed'; |
9 | |
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10 | our $VERSION = '0.24'; |
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11 | |
12 | our %METHOD_CACHE; |
13 | |
14 | sub method { |
15 | my $self = $_[0]; |
16 | my $class = blessed($self) || $self; |
17 | my $indirect = caller() =~ /^(?:next|maybe::next)$/; |
18 | my $level = $indirect ? 2 : 1; |
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19 | |
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20 | my ($method_caller, $label, @label); |
21 | while ($method_caller = (caller($level++))[3]) { |
22 | @label = (split '::', $method_caller); |
23 | $label = pop @label; |
24 | last unless |
25 | $label eq '(eval)' || |
26 | $label eq '__ANON__'; |
27 | } |
28 | |
29 | my $method; |
30 | |
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31 | my $caller = join '::' => @label; |
32 | |
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33 | $method = $METHOD_CACHE{"$class|$caller|$label"} ||= do { |
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34 | |
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35 | my @MRO = Class::C3::calculateMRO($class); |
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36 | |
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37 | my $current; |
38 | while ($current = shift @MRO) { |
39 | last if $caller eq $current; |
40 | } |
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41 | |
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42 | no strict 'refs'; |
43 | my $found; |
44 | foreach my $class (@MRO) { |
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45 | next if (defined $Class::C3::MRO{$class} && |
46 | defined $Class::C3::MRO{$class}{methods}{$label}); |
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47 | last if (defined ($found = *{$class . '::' . $label}{CODE})); |
48 | } |
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49 | |
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50 | $found; |
51 | }; |
52 | |
53 | return $method if $indirect; |
54 | |
55 | die "No next::method '$label' found for $self" if !$method; |
56 | |
57 | goto &{$method}; |
58 | } |
59 | |
60 | sub can { method($_[0]) } |
61 | |
62 | package # hide me from PAUSE |
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63 | maybe::next; |
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64 | |
65 | use strict; |
66 | use warnings; |
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67 | no warnings 'redefine'; # for 00load.t w/ core support |
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68 | |
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69 | our $VERSION = '0.24'; |
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70 | |
71 | sub method { (next::method($_[0]) || return)->(@_) } |
72 | |
73 | 1; |
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74 | |
75 | __END__ |
76 | |
77 | =pod |
78 | |
79 | =head1 NAME |
80 | |
81 | Class::C3::next - Pure-perl next::method and friends |
82 | |
83 | =head1 DESCRIPTION |
84 | |
85 | This module is used internally by L<Class::C3> when |
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86 | necessary, and shouldn't be used (or required in |
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87 | distribution dependencies) directly. It |
88 | defines C<next::method>, C<next::can>, and |
89 | C<maybe::next::method> in pure perl. |
90 | |
91 | =head1 AUTHOR |
92 | |
93 | Stevan Little, E<lt>stevan@iinteractive.comE<gt> |
94 | |
95 | Brandon L. Black, E<lt>blblack@gmail.comE<gt> |
96 | |
97 | =head1 COPYRIGHT AND LICENSE |
98 | |
99 | Copyright 2005, 2006 by Infinity Interactive, Inc. |
100 | |
101 | L<http://www.iinteractive.com> |
102 | |
103 | This library is free software; you can redistribute it and/or modify |
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104 | it under the same terms as Perl itself. |
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105 | |
106 | =cut |