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1 | use strict; |
2 | use warnings; |
3 | |
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4 | use Test::More tests => 6; |
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5 | |
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6 | use Class::MOP; |
7 | use Class::MOP::Class; |
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8 | |
9 | =pod |
10 | |
11 | A |
12 | / \ |
13 | B C |
14 | \ / |
15 | D |
16 | |
17 | =cut |
18 | |
19 | { |
20 | package My::A; |
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21 | use metaclass; |
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22 | package My::B; |
23 | our @ISA = ('My::A'); |
24 | package My::C; |
25 | our @ISA = ('My::A'); |
26 | package My::D; |
27 | our @ISA = ('My::B', 'My::C'); |
28 | } |
29 | |
30 | is_deeply( |
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31 | [ My::D->meta->class_precedence_list ], |
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32 | [ 'My::D', 'My::B', 'My::A', 'My::C', 'My::A' ], |
33 | '... My::D->meta->class_precedence_list == (D B A C A)'); |
34 | |
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35 | is_deeply( |
36 | [ My::D->meta->linearized_isa ], |
37 | [ 'My::D', 'My::B', 'My::A', 'My::C' ], |
38 | '... My::D->meta->linearized_isa == (D B A C)'); |
39 | |
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40 | =pod |
41 | |
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42 | A <-+ |
43 | | | |
44 | B | |
45 | | | |
46 | C --+ |
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47 | |
48 | =cut |
49 | |
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50 | # 5.9.5+ dies at the moment of |
51 | # recursive @ISA definition, not later when |
52 | # you try to use the @ISAs. |
53 | eval { |
54 | { |
55 | package My::2::A; |
56 | use metaclass; |
57 | our @ISA = ('My::2::C'); |
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58 | |
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59 | package My::2::B; |
60 | our @ISA = ('My::2::A'); |
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61 | |
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62 | package My::2::C; |
63 | our @ISA = ('My::2::B'); |
64 | } |
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65 | |
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66 | My::2::B->meta->class_precedence_list |
67 | }; |
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68 | ok($@, '... recursive inheritance breaks correctly :)'); |
69 | |
70 | =pod |
71 | |
72 | +--------+ |
73 | | A | |
74 | | / \ | |
75 | +->B C-+ |
76 | \ / |
77 | D |
78 | |
79 | =cut |
80 | |
81 | { |
82 | package My::3::A; |
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83 | use metaclass; |
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84 | package My::3::B; |
85 | our @ISA = ('My::3::A'); |
86 | package My::3::C; |
87 | our @ISA = ('My::3::A', 'My::3::B'); |
88 | package My::3::D; |
89 | our @ISA = ('My::3::B', 'My::3::C'); |
90 | } |
91 | |
92 | is_deeply( |
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93 | [ My::3::D->meta->class_precedence_list ], |
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94 | [ 'My::3::D', 'My::3::B', 'My::3::A', 'My::3::C', 'My::3::A', 'My::3::B', 'My::3::A' ], |
95 | '... My::3::D->meta->class_precedence_list == (D B A C A B A)'); |
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96 | |
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97 | is_deeply( |
98 | [ My::3::D->meta->linearized_isa ], |
99 | [ 'My::3::D', 'My::3::B', 'My::3::A', 'My::3::C' ], |
100 | '... My::3::D->meta->linearized_isa == (D B A C B)'); |
101 | |
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102 | =pod |
103 | |
104 | Test all the class_precedence_lists |
105 | using Perl's own dispatcher to check |
106 | against. |
107 | |
108 | =cut |
109 | |
110 | my @CLASS_PRECEDENCE_LIST; |
111 | |
112 | { |
113 | package Foo; |
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114 | use metaclass; |
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115 | |
116 | sub CPL { push @CLASS_PRECEDENCE_LIST => 'Foo' } |
117 | |
118 | package Bar; |
119 | our @ISA = ('Foo'); |
120 | |
121 | sub CPL { |
122 | push @CLASS_PRECEDENCE_LIST => 'Bar'; |
123 | $_[0]->SUPER::CPL(); |
124 | } |
125 | |
126 | package Baz; |
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127 | use metaclass; |
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128 | our @ISA = ('Bar'); |
129 | |
130 | sub CPL { |
131 | push @CLASS_PRECEDENCE_LIST => 'Baz'; |
132 | $_[0]->SUPER::CPL(); |
133 | } |
134 | |
135 | package Foo::Bar; |
136 | our @ISA = ('Baz'); |
137 | |
138 | sub CPL { |
139 | push @CLASS_PRECEDENCE_LIST => 'Foo::Bar'; |
140 | $_[0]->SUPER::CPL(); |
141 | } |
142 | |
143 | package Foo::Bar::Baz; |
144 | our @ISA = ('Foo::Bar'); |
145 | |
146 | sub CPL { |
147 | push @CLASS_PRECEDENCE_LIST => 'Foo::Bar::Baz'; |
148 | $_[0]->SUPER::CPL(); |
149 | } |
150 | |
151 | } |
152 | |
153 | Foo::Bar::Baz->CPL(); |
154 | |
155 | is_deeply( |
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156 | [ Foo::Bar::Baz->meta->class_precedence_list ], |
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157 | [ @CLASS_PRECEDENCE_LIST ], |
158 | '... Foo::Bar::Baz->meta->class_precedence_list == @CLASS_PRECEDENCE_LIST'); |
159 | |