Commit | Line | Data |
a41c0667 |
1 | package Mouse::Meta::Method::Accessor; |
2 | use strict; |
3 | use warnings; |
4 | |
5 | sub _install_accessor{ |
6 | my (undef, $attribute, $method_name, $class, $type) = @_; |
7 | |
8 | my $name = $attribute->name; |
9 | my $default = $attribute->default; |
10 | my $constraint = $attribute->type_constraint; |
11 | my $builder = $attribute->builder; |
12 | my $trigger = $attribute->trigger; |
13 | my $is_weak = $attribute->is_weak_ref; |
14 | my $should_deref = $attribute->should_auto_deref; |
15 | my $should_coerce = $attribute->should_coerce; |
16 | |
17 | my $compiled_type_constraint = $constraint ? $constraint->{_compiled_type_constraint} : undef; |
18 | |
19 | my $self = '$_[0]'; |
20 | my $key = $attribute->_inlined_name; |
21 | |
22 | $type ||= 'accessor'; |
23 | |
24 | my $accessor = |
25 | '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . |
26 | "sub {\n"; |
27 | if ($type eq 'accessor' || $type eq 'writer') { |
28 | if($type eq 'accessor'){ |
29 | $accessor .= |
30 | '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . |
31 | 'if (scalar(@_) >= 2) {' . "\n"; |
32 | } |
33 | else{ # writer |
34 | $accessor .= |
35 | '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . |
36 | 'if(@_ < 2){ Carp::confess("Not enough arguments for writer '.$method_name.'") }'. |
37 | '{' . "\n"; |
38 | } |
39 | |
40 | my $value = '$_[1]'; |
41 | |
42 | if ($constraint) { |
43 | if ($should_coerce) { |
44 | $accessor .= |
45 | "\n". |
46 | '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . |
47 | 'my $val = Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{type_constraint}, '.$value.');'; |
48 | $value = '$val'; |
49 | } |
50 | if ($compiled_type_constraint) { |
51 | $accessor .= |
52 | "\n". |
53 | '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . |
54 | 'unless ($compiled_type_constraint->('.$value.')) { |
55 | $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint}); |
56 | }' . "\n"; |
57 | } else { |
58 | $accessor .= |
59 | "\n". |
60 | '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . |
61 | 'unless ($constraint->check('.$value.')) { |
62 | $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint}); |
63 | }' . "\n"; |
64 | } |
65 | } |
66 | |
67 | # if there's nothing left to do for the attribute we can return during |
68 | # this setter |
69 | $accessor .= 'return ' if !$is_weak && !$trigger && !$should_deref; |
70 | |
71 | $accessor .= $self.'->{'.$key.'} = '.$value.';' . "\n"; |
72 | |
73 | if ($is_weak) { |
74 | $accessor .= 'Scalar::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n"; |
75 | } |
76 | |
77 | if ($trigger) { |
78 | $accessor .= '$trigger->('.$self.', '.$value.');' . "\n"; |
79 | } |
80 | |
81 | $accessor .= "}\n"; |
82 | } |
83 | elsif($type eq 'reader') { |
84 | $accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n"; |
85 | } |
86 | else{ |
87 | $class->throw_error("Unknown accessor type '$type'"); |
88 | } |
89 | |
90 | if ($attribute->is_lazy) { |
91 | $accessor .= $self.'->{'.$key.'} = '; |
92 | |
93 | $accessor .= $attribute->has_builder |
94 | ? $self.'->$builder' |
95 | : ref($default) eq 'CODE' |
96 | ? '$default->('.$self.')' |
97 | : '$default'; |
98 | $accessor .= ' if !exists '.$self.'->{'.$key.'};' . "\n"; |
99 | } |
100 | |
101 | if ($should_deref) { |
102 | if ($constraint->is_a_type_of('ArrayRef')) { |
103 | $accessor .= 'if (wantarray) { |
104 | return @{ '.$self.'->{'.$key.'} || [] }; |
105 | }'; |
106 | } |
107 | elsif($constraint->is_a_type_of('HashRef')){ |
108 | $accessor .= 'if (wantarray) { |
109 | return %{ '.$self.'->{'.$key.'} || {} }; |
110 | }'; |
111 | } |
112 | else{ |
113 | $class->throw_error("Can not auto de-reference the type constraint " . $constraint->name); |
114 | } |
115 | } |
116 | |
117 | $accessor .= 'return '.$self.'->{'.$key."};\n}"; |
118 | |
119 | #print $accessor, "\n"; |
120 | my $code = eval $accessor; |
121 | $attribute->throw_error($@) if $@; |
122 | |
123 | $class->add_method($method_name => $code); |
124 | return; |
125 | } |
126 | |
127 | sub _install_reader{ |
128 | my $class = shift; |
129 | $class->_install_accessor(@_, 'reader'); |
130 | return; |
131 | } |
132 | |
133 | sub _install_writer{ |
134 | my $class = shift; |
135 | $class->_install_accessor(@_, 'writer'); |
136 | return; |
137 | } |
138 | |
139 | |
140 | sub _install_predicate { |
141 | my (undef, $attribute, $method_name, $class) = @_; |
142 | |
143 | my $key = $attribute->_inlined_name; |
144 | |
145 | my $predicate = 'sub { exists($_[0]->{'.$key.'}) }'; |
146 | |
147 | my $code = eval $predicate; |
148 | $attribute->throw_error($@) if $@; |
149 | $class->add_method($method_name => $code); |
150 | return; |
151 | } |
152 | |
153 | sub _install_clearer { |
154 | my (undef, $attribute, $method_name, $class) = @_; |
155 | |
156 | my $key = $attribute->_inlined_name; |
157 | |
158 | my $clearer = 'sub { delete($_[0]->{'.$key.'}) }'; |
159 | |
160 | my $code = eval $clearer; |
161 | $attribute->throw_error($@) if $@; |
162 | $class->add_method($method_name => $code); |
163 | return; |
164 | } |
165 | |
166 | sub _install_handles { |
167 | my (undef, $attribute, $handles, $class) = @_; |
168 | |
169 | my $reader = $attribute->name; |
170 | my %handles = $attribute->_canonicalize_handles($handles); |
171 | |
172 | my @methods; |
173 | |
174 | foreach my $local_method (keys %handles) { |
175 | my $remote_method = $handles{$local_method}; |
176 | |
177 | my $method = 'sub { |
178 | my $self = shift; |
179 | $self->'.$reader.'->'.$remote_method.'(@_) |
180 | }'; |
181 | |
182 | my $code = eval $method; |
183 | $attribute->throw_error($@) if $@; |
184 | |
185 | push @methods, ($local_method => $code); |
186 | } |
187 | |
188 | # install after all the method compiled successfully |
189 | while(my($name, $code) = splice @methods, 0, 2){ |
190 | $class->add_method($name, $code); |
191 | } |
192 | return; |
193 | } |
194 | |
195 | |
196 | 1; |