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fc1d8369 |
1 | package Mouse::Meta::Method::Constructor; |
2 | use strict; |
3 | use warnings; |
4 | |
5 | sub generate_constructor_method_inline { |
41cdacce |
6 | my ($class, $meta) = @_; |
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7 | |
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8 | my @attrs = $meta->compute_all_applicable_attributes; # this one is using by evaled code |
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9 | my $buildall = $class->_generate_BUILDALL($meta); |
10 | my $buildargs = $class->_generate_BUILDARGS(); |
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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 | ... |
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23 | |
24 | warn $code if $ENV{DEBUG}; |
25 | |
26 | local $@; |
27 | my $res = eval $code; |
28 | die $@ if $@; |
29 | $res; |
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30 | } |
31 | |
32 | sub _generate_processattrs { |
c12edd9a |
33 | my ($class, $meta, $attrs) = @_; |
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34 | my @res; |
c12edd9a |
35 | for my $index (0..scalar(@$attrs)-1) { |
36 | my $attr = $attrs->[$index]; |
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37 | my $from = $attr->init_arg; |
38 | my $key = $attr->name; |
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39 | |
f262f14e |
40 | my $set_value = do { |
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41 | my @code; |
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42 | |
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43 | if ($attr->should_coerce) { |
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44 | push @code, "my \$value = \$attr->coerce_constraint( \$args->{'$from'});"; |
45 | } |
46 | else { |
47 | push @code, "my \$value = \$args->{'$from'};"; |
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48 | } |
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49 | |
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50 | if ($attr->has_type_constraint) { |
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51 | push @code, "\$attr->verify_type_constraint( \$value );"; |
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52 | } |
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53 | |
54 | push @code, "\$instance->{'$key'} = \$value;"; |
55 | |
41cdacce |
56 | if ($attr->is_weak_ref) { |
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57 | push @code, "weaken( \$instance->{'$key'} ) if ref( \$value );"; |
41cdacce |
58 | } |
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59 | |
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60 | if ( $attr->has_trigger ) { |
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61 | push @code, "\$attr->trigger->( \$instance, \$value, \$attr );"; |
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62 | } |
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63 | |
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64 | join "\n", @code; |
65 | }; |
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66 | |
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67 | my $make_default_value = do { |
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68 | my @code; |
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69 | |
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70 | if ( $attr->has_default || $attr->has_builder ) { |
71 | unless ( $attr->is_lazy ) { |
72 | my $default = $attr->default; |
73 | my $builder = $attr->builder; |
e8ba7b26 |
74 | |
75 | push @code, "my \$value = "; |
76 | |
77 | if ($attr->should_coerce) { |
78 | push @code, "\$attr->coerce_constraint("; |
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79 | } |
e8ba7b26 |
80 | |
81 | if ($attr->has_builder) { |
82 | push @code, "\$instance->$builder"; |
83 | } |
84 | elsif (ref($default) eq 'CODE') { |
85 | push @code, "\$attr->default()->()"; |
86 | } |
87 | else { |
88 | push @code, "\$attr->default()"; |
89 | } |
90 | |
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91 | if ($attr->should_coerce) { |
e8ba7b26 |
92 | push @code, ");"; |
93 | } |
94 | else { |
95 | push @code, ";"; |
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96 | } |
e8ba7b26 |
97 | |
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98 | if ($attr->has_type_constraint) { |
99 | push @code, "\$attr->verify_type_constraint(\$value);"; |
100 | } |
e8ba7b26 |
101 | |
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102 | push @code, "\$instance->{'$key'} = \$value;"; |
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103 | |
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104 | if ($attr->is_weak_ref) { |
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105 | push @code, "weaken( \$instance->{'$key'} ) if ref( \$value );"; |
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106 | } |
107 | } |
108 | join "\n", @code; |
109 | } |
110 | else { |
111 | if ( $attr->is_required ) { |
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112 | qq{Carp::confess("Attribute ($key) is required");}; |
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113 | } else { |
114 | "" |
115 | } |
116 | } |
117 | }; |
118 | my $code = <<"..."; |
119 | { |
c12edd9a |
120 | my \$attr = \$attrs[$index]; |
95e0838c |
121 | if (exists(\$args->{'$from'})) { |
f262f14e |
122 | $set_value; |
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123 | } else { |
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124 | $make_default_value; |
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125 | } |
126 | } |
127 | ... |
128 | push @res, $code; |
129 | } |
130 | return join "\n", @res; |
131 | } |
132 | |
133 | sub _generate_BUILDARGS { |
134 | <<'...'; |
135 | do { |
136 | if ( scalar @_ == 1 ) { |
137 | if ( defined $_[0] ) { |
138 | ( ref( $_[0] ) eq 'HASH' ) |
139 | || Carp::confess "Single parameters to new() must be a HASH ref"; |
140 | +{ %{ $_[0] } }; |
141 | } |
142 | else { |
143 | +{}; |
144 | } |
145 | } |
146 | else { |
147 | +{@_}; |
148 | } |
149 | }; |
150 | ... |
151 | } |
152 | |
153 | sub _generate_BUILDALL { |
154 | my ($class, $meta) = @_; |
155 | return '' unless $meta->name->can('BUILD'); |
156 | |
157 | my @code = (); |
158 | push @code, q{no strict 'refs';}; |
159 | push @code, q{no warnings 'once';}; |
160 | no strict 'refs'; |
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161 | for my $klass ($meta->linearized_isa) { |
162 | if (*{ $klass . '::BUILD' }{CODE}) { |
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163 | push @code, qq{${klass}::BUILD(\$instance, \$args);}; |
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164 | } |
165 | } |
166 | return join "\n", @code; |
167 | } |
168 | |
169 | 1; |