Commit | Line | Data |
fc1d8369 |
1 | package Mouse::Meta::Method::Constructor; |
3821b191 |
2 | use Mouse::Util qw(:meta); # enables strict and warnings |
fc1d8369 |
3 | |
f031f4d5 |
4 | sub _inline_slot{ |
f8cbb121 |
5 | my(undef, $self_var, $attr_name) = @_; |
6 | return sprintf '%s->{q{%s}}', $self_var, $attr_name; |
7 | } |
8 | |
380e1cd7 |
9 | sub _generate_constructor { |
2a464664 |
10 | my ($class, $metaclass, $args) = @_; |
24ad3f66 |
11 | |
f031f4d5 |
12 | my $associated_metaclass_name = $metaclass->name; |
13 | |
3db78d2a |
14 | my $buildall = $class->_generate_BUILDALL($metaclass); |
f031f4d5 |
15 | my $buildargs = $class->_generate_BUILDARGS($metaclass); |
abbcd124 |
16 | my $initializer = $metaclass->{_mouse_cache}{_initialize_object} ||= |
51b0597d |
17 | $class->_generate_initialize_object($metaclass); |
abbcd124 |
18 | |
a3a09e38 |
19 | my $source = sprintf(<<'EOT', __LINE__, __FILE__, $metaclass->name, $buildargs, $buildall); |
20 | #line %d %s |
21 | package %s; |
22 | sub { |
23 | my $class = shift; |
24 | return $class->Mouse::Object::new(@_) |
25 | if $class ne __PACKAGE__; |
0bfc7290 |
26 | # BUILDARGS |
a3a09e38 |
27 | %s; |
28 | my $instance = bless {}, $class; |
ab688693 |
29 | $metaclass->$initializer($instance, $args, 0); |
0bfc7290 |
30 | # BUILDALL |
a3a09e38 |
31 | %s; |
32 | return $instance; |
2a464664 |
33 | } |
a3a09e38 |
34 | EOT |
0bfc7290 |
35 | #warn $source; |
a3a09e38 |
36 | my $body; |
ad087d11 |
37 | my $e = do{ |
38 | local $@; |
a3a09e38 |
39 | $body = eval $source; |
ad087d11 |
40 | $@; |
41 | }; |
42 | die $e if $e; |
a3a09e38 |
43 | return $body; |
fc1d8369 |
44 | } |
45 | |
a3a09e38 |
46 | sub _generate_initialize_object { |
47 | my ($method_class, $metaclass) = @_; |
48 | my @attrs = $metaclass->get_all_attributes; |
49 | |
50 | my @checks = map { $_ && $_->_compiled_type_constraint } |
51 | map { $_->type_constraint } @attrs; |
52 | |
fc1d8369 |
53 | my @res; |
9df6f0cd |
54 | |
2efc0af1 |
55 | my $has_triggers; |
fb4ddd88 |
56 | my $strict = $metaclass->strict_constructor; |
e128626c |
57 | |
8801a6e6 |
58 | if($strict){ |
e128626c |
59 | push @res, 'my $used = 0;'; |
60 | } |
2efc0af1 |
61 | |
a3a09e38 |
62 | for my $index (0 .. @attrs - 1) { |
0bfc7290 |
63 | my $code = ''; |
64 | |
a3a09e38 |
65 | my $attr = $attrs[$index]; |
fc1d8369 |
66 | my $key = $attr->name; |
9df6f0cd |
67 | |
0bfc7290 |
68 | my $init_arg = $attr->init_arg; |
69 | my $type_constraint = $attr->type_constraint; |
8aba926d |
70 | my $is_weak_ref = $attr->is_weak_ref; |
0bfc7290 |
71 | my $need_coercion; |
c91862e8 |
72 | |
f031f4d5 |
73 | my $instance_slot = $method_class->_inline_slot('$instance', $key); |
0bfc7290 |
74 | my $attr_var = "\$attrs[$index]"; |
75 | my $constraint_var; |
c91862e8 |
76 | |
0bfc7290 |
77 | if(defined $type_constraint){ |
78 | $constraint_var = "$attr_var\->{type_constraint}"; |
79 | $need_coercion = ($attr->should_coerce && $type_constraint->has_coercion); |
80 | } |
c91862e8 |
81 | |
0bfc7290 |
82 | $code .= "# initialize $key\n"; |
83 | |
84 | my $post_process = ''; |
85 | if(defined $type_constraint){ |
a3a09e38 |
86 | $post_process .= "\$checks[$index]->($instance_slot)\n"; |
da23cd4a |
87 | $post_process .= " or $attr_var->_throw_type_constraint_error($instance_slot, $constraint_var);\n"; |
0bfc7290 |
88 | } |
8aba926d |
89 | if($is_weak_ref){ |
a3a09e38 |
90 | $post_process = "Scalar::Util::weaken($instance_slot) " |
91 | . "if ref $instance_slot;\n"; |
0bfc7290 |
92 | } |
c91862e8 |
93 | |
a3a09e38 |
94 | # build cde for an attribute |
0bfc7290 |
95 | if (defined $init_arg) { |
96 | my $value = "\$args->{q{$init_arg}}"; |
c91862e8 |
97 | |
0bfc7290 |
98 | $code .= "if (exists $value) {\n"; |
99 | |
100 | if($need_coercion){ |
620c3203 |
101 | $value = "$constraint_var->coerce($value)"; |
41cdacce |
102 | } |
c91862e8 |
103 | |
f031f4d5 |
104 | $code .= "$instance_slot = $value;\n"; |
0bfc7290 |
105 | $code .= $post_process; |
106 | |
9df6f0cd |
107 | if ($attr->has_trigger) { |
2efc0af1 |
108 | $has_triggers++; |
620c3203 |
109 | $code .= "push \@triggers, [$attr_var\->{trigger}, $instance_slot];\n"; |
fc1d8369 |
110 | } |
c91862e8 |
111 | |
8801a6e6 |
112 | if ($strict){ |
113 | $code .= '++$used;' . "\n"; |
e128626c |
114 | } |
115 | |
116 | $code .= "\n} else {\n"; # $value exists |
9df6f0cd |
117 | } |
c91862e8 |
118 | |
9df6f0cd |
119 | if ($attr->has_default || $attr->has_builder) { |
120 | unless ($attr->is_lazy) { |
121 | my $default = $attr->default; |
122 | my $builder = $attr->builder; |
e8ba7b26 |
123 | |
0bfc7290 |
124 | my $value; |
125 | if (defined($builder)) { |
126 | $value = "\$instance->$builder()"; |
ffbbf459 |
127 | } |
128 | elsif (ref($default) eq 'CODE') { |
0bfc7290 |
129 | $value = "$attr_var\->{default}->(\$instance)"; |
ffbbf459 |
130 | } |
0bfc7290 |
131 | elsif (defined($default)) { |
132 | $value = "$attr_var\->{default}"; |
ffbbf459 |
133 | } |
134 | else { |
0bfc7290 |
135 | $value = 'undef'; |
ffbbf459 |
136 | } |
e8ba7b26 |
137 | |
0bfc7290 |
138 | if($need_coercion){ |
139 | $value = "$constraint_var->coerce($value)"; |
9df6f0cd |
140 | } |
9df6f0cd |
141 | |
f031f4d5 |
142 | $code .= "$instance_slot = $value;\n"; |
a3a09e38 |
143 | $code .= $post_process; |
fc1d8369 |
144 | } |
713a2a05 |
145 | } |
9df6f0cd |
146 | elsif ($attr->is_required) { |
a3a09e38 |
147 | $code .= "\$meta->throw_error('Attribute ($key) is required')"; |
148 | $code .= " unless \$is_cloning;\n"; |
9df6f0cd |
149 | } |
150 | |
0bfc7290 |
151 | $code .= "}\n" if defined $init_arg; |
9df6f0cd |
152 | |
fc1d8369 |
153 | push @res, $code; |
154 | } |
9df6f0cd |
155 | |
8801a6e6 |
156 | if($strict){ |
e128626c |
157 | push @res, q{if($used < keys %{$args})} |
a3a09e38 |
158 | . q{{ $meta->_report_unknown_args(\@attrs, $args) }}; |
e128626c |
159 | } |
160 | |
2efc0af1 |
161 | if($metaclass->is_anon_class){ |
a3a09e38 |
162 | push @res, q{$instance->{__METACLASS__} = $meta;}; |
2efc0af1 |
163 | } |
164 | |
165 | if($has_triggers){ |
166 | unshift @res, q{my @triggers;}; |
e128626c |
167 | push @res, q{$_->[0]->($instance, $_->[1]) for @triggers;}; |
2efc0af1 |
168 | } |
169 | |
a3a09e38 |
170 | my $source = sprintf <<'EOT', __LINE__, __FILE__, $metaclass->name, join "\n", @res; |
171 | #line %d %s |
172 | package %s; |
173 | sub { |
174 | my($meta, $instance, $args, $is_cloning) = @_; |
175 | %s; |
176 | return $instance; |
177 | } |
178 | EOT |
179 | warn $source if $ENV{MOUSE_DEBUG}; |
180 | my $body; |
181 | my $e = do { |
182 | local $@; |
183 | $body = eval $source; |
184 | $@; |
185 | }; |
186 | die $e if $e; |
187 | return $body; |
fc1d8369 |
188 | } |
189 | |
190 | sub _generate_BUILDARGS { |
0bfc7290 |
191 | my(undef, $metaclass) = @_; |
9dcd7d23 |
192 | |
0bfc7290 |
193 | my $class = $metaclass->name; |
194 | if ( $class->can('BUILDARGS') && $class->can('BUILDARGS') != \&Mouse::Object::BUILDARGS ) { |
53d4053e |
195 | return 'my $args = $class->BUILDARGS(@_)'; |
9dcd7d23 |
196 | } |
197 | |
198 | return <<'...'; |
53d4053e |
199 | my $args; |
fc1d8369 |
200 | if ( scalar @_ == 1 ) { |
c9aefe26 |
201 | ( ref( $_[0] ) eq 'HASH' ) |
fc1d8369 |
202 | || Carp::confess "Single parameters to new() must be a HASH ref"; |
53d4053e |
203 | $args = +{ %{ $_[0] } }; |
fc1d8369 |
204 | } |
205 | else { |
53d4053e |
206 | $args = +{@_}; |
fc1d8369 |
207 | } |
fc1d8369 |
208 | ... |
209 | } |
210 | |
211 | sub _generate_BUILDALL { |
0bfc7290 |
212 | my (undef, $metaclass) = @_; |
7ca5c5fb |
213 | |
2efc0af1 |
214 | return '' unless $metaclass->name->can('BUILD'); |
fc1d8369 |
215 | |
7ca5c5fb |
216 | my @code; |
217 | for my $class ($metaclass->linearized_isa) { |
a5c683f6 |
218 | if (Mouse::Util::get_code_ref($class, 'BUILD')) { |
7ca5c5fb |
219 | unshift @code, qq{${class}::BUILD(\$instance, \$args);}; |
fc1d8369 |
220 | } |
221 | } |
222 | return join "\n", @code; |
223 | } |
224 | |
225 | 1; |
0126c27c |
226 | __END__ |
a25ca8d6 |
227 | |
228 | =head1 NAME |
229 | |
230 | Mouse::Meta::Method::Constructor - A Mouse method generator for constructors |
231 | |
232 | =head1 VERSION |
233 | |
b0d52f03 |
234 | This document describes Mouse version 0.73 |
a25ca8d6 |
235 | |
236 | =head1 SEE ALSO |
237 | |
238 | L<Moose::Meta::Method::Constructor> |
239 | |
240 | =cut |