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fc1d8369 |
1 | package Mouse::Meta::Method::Constructor; |
2 | use strict; |
3 | use warnings; |
4 | |
5 | sub generate_constructor_method_inline { |
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6 | my ($class, $meta) = @_; |
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7 | |
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8 | my @attrs = $meta->compute_all_applicable_attributes; |
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9 | my $buildall = $class->_generate_BUILDALL($meta); |
10 | my $buildargs = $class->_generate_BUILDARGS(); |
c12edd9a |
11 | my $processattrs = $class->_generate_processattrs($meta, \@attrs); |
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12 | |
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13 | my $code = <<"..."; |
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14 | sub { |
15 | my \$class = shift; |
16 | my \$args = $buildargs; |
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17 | my \$instance = bless {}, \$class; |
fc1d8369 |
18 | $processattrs; |
19 | $buildall; |
20 | return \$instance; |
21 | } |
22 | ... |
24ad3f66 |
23 | |
24ad3f66 |
24 | local $@; |
25 | my $res = eval $code; |
26 | die $@ if $@; |
27 | $res; |
fc1d8369 |
28 | } |
29 | |
30 | sub _generate_processattrs { |
c12edd9a |
31 | my ($class, $meta, $attrs) = @_; |
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32 | my @res; |
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33 | |
34 | for my $index (0 .. @$attrs - 1) { |
c12edd9a |
35 | my $attr = $attrs->[$index]; |
fc1d8369 |
36 | my $key = $attr->name; |
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37 | my $code = ''; |
38 | |
39 | if (defined $attr->init_arg) { |
40 | my $from = $attr->init_arg; |
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41 | |
9df6f0cd |
42 | $code .= "if (exists \$args->{'$from'}) {\n"; |
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43 | |
b3b74cc6 |
44 | if ($attr->should_coerce && $attr->type_constraint) { |
9df6f0cd |
45 | $code .= "my \$value = Mouse::TypeRegistry->typecast_constraints('".$attr->associated_class->name."', \$attrs[$index]->{find_type_constraint}, \$attrs[$index]->{type_constraint}, \$args->{'$from'});"; |
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46 | } |
47 | else { |
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48 | $code .= "my \$value = \$args->{'$from'};"; |
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49 | } |
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50 | |
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51 | if ($attr->has_type_constraint) { |
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52 | $code .= "{local \$_ = \$value; unless (\$attrs[$index]->{find_type_constraint}->(\$_)) {"; |
53 | $code .= "\$attrs[$index]->verify_type_constraint_error('$key', \$_, \$attrs[$index]->type_constraint)}}"; |
fc1d8369 |
54 | } |
c91862e8 |
55 | |
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56 | $code .= "\$instance->{'$key'} = \$value;"; |
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57 | |
41cdacce |
58 | if ($attr->is_weak_ref) { |
9df6f0cd |
59 | $code .= "Scalar::Util::weaken( \$instance->{'$key'} ) if ref( \$value );"; |
41cdacce |
60 | } |
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61 | |
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62 | if ($attr->has_trigger) { |
63 | $code .= "\$attrs[$index]->{trigger}->( \$instance, \$value, \$attrs[$index] );"; |
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64 | } |
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65 | |
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66 | $code .= "} else {"; |
67 | } |
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68 | |
9df6f0cd |
69 | if ($attr->has_default || $attr->has_builder) { |
70 | unless ($attr->is_lazy) { |
71 | my $default = $attr->default; |
72 | my $builder = $attr->builder; |
e8ba7b26 |
73 | |
9df6f0cd |
74 | $code .= "my \$value = "; |
e8ba7b26 |
75 | |
9df6f0cd |
76 | if ($attr->should_coerce && $attr->type_constraint) { |
77 | $code .= "Mouse::TypeRegistry->typecast_constraints('".$attr->associated_class->name."', \$attrs[$index]->{find_type_constraint}, \$attrs[$index]->{type_constraint}, "; |
78 | } |
e8ba7b26 |
79 | |
9df6f0cd |
80 | if ($attr->has_builder) { |
81 | $code .= "\$instance->$builder"; |
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82 | } |
9df6f0cd |
83 | elsif (ref($default) eq 'CODE') { |
84 | $code .= "\$attrs[$index]->{default}->(\$instance)"; |
e8ba7b26 |
85 | } |
9df6f0cd |
86 | elsif (!defined($default)) { |
87 | $code .= 'undef'; |
fc1d8369 |
88 | } |
9df6f0cd |
89 | elsif ($default =~ /^\-?[0-9]+(?:\.[0-9]+)$/) { |
90 | $code .= $default; |
91 | } |
92 | else { |
93 | $code .= "'$default'"; |
fc1d8369 |
94 | } |
e8ba7b26 |
95 | |
9df6f0cd |
96 | if ($attr->should_coerce) { |
97 | $code .= ");"; |
98 | } |
99 | else { |
100 | $code .= ";"; |
101 | } |
e8ba7b26 |
102 | |
9df6f0cd |
103 | if ($attr->has_type_constraint) { |
104 | $code .= "{local \$_ = \$value; unless (\$attrs[$index]->{find_type_constraint}->(\$_)) {"; |
105 | $code .= "\$attrs[$index]->verify_type_constraint_error('$key', \$_, \$attrs[$index]->type_constraint)}}"; |
fc1d8369 |
106 | } |
9df6f0cd |
107 | |
108 | $code .= "\$instance->{'$key'} = \$value;"; |
109 | |
110 | if ($attr->is_weak_ref) { |
111 | $code .= "Scalar::Util::weaken( \$instance->{'$key'} ) if ref( \$value );"; |
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112 | } |
113 | } |
713a2a05 |
114 | } |
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115 | elsif ($attr->is_required) { |
116 | $code .= qq{Carp::confess("Attribute ($key) is required");}; |
117 | } |
118 | |
119 | $code .= "}" if defined $attr->init_arg; |
120 | |
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121 | push @res, $code; |
122 | } |
9df6f0cd |
123 | |
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124 | return join "\n", @res; |
125 | } |
126 | |
127 | sub _generate_BUILDARGS { |
128 | <<'...'; |
129 | do { |
130 | if ( scalar @_ == 1 ) { |
131 | if ( defined $_[0] ) { |
132 | ( ref( $_[0] ) eq 'HASH' ) |
133 | || Carp::confess "Single parameters to new() must be a HASH ref"; |
134 | +{ %{ $_[0] } }; |
135 | } |
136 | else { |
137 | +{}; |
138 | } |
139 | } |
140 | else { |
141 | +{@_}; |
142 | } |
143 | }; |
144 | ... |
145 | } |
146 | |
147 | sub _generate_BUILDALL { |
148 | my ($class, $meta) = @_; |
149 | return '' unless $meta->name->can('BUILD'); |
150 | |
151 | my @code = (); |
152 | push @code, q{no strict 'refs';}; |
153 | push @code, q{no warnings 'once';}; |
154 | no strict 'refs'; |
ca3bebbd |
155 | for my $klass ($meta->linearized_isa) { |
156 | if (*{ $klass . '::BUILD' }{CODE}) { |
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157 | push @code, qq{${klass}::BUILD(\$instance, \$args);}; |
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158 | } |
159 | } |
160 | return join "\n", @code; |
161 | } |
162 | |
163 | 1; |