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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; # 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; |
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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 | $res; |
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30 | } |
31 | |
32 | sub _generate_processattrs { |
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33 | my ($class, $meta, $attrs) = @_; |
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34 | my @res; |
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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; |
39 | my $part1 = do { |
40 | my @code; |
41 | if ($attr->should_coerce) { |
42 | push @code, "\$args->{\$from} = \$attr->coerce_constraint( \$args->{\$from} );"; |
43 | } |
44 | if ($attr->has_type_constraint) { |
45 | push @code, "\$attr->verify_type_constraint( \$args->{\$from} );"; |
46 | } |
47 | push @code, "\$instance->{\$key} = \$args->{\$from};"; |
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48 | if ($attr->is_weak_ref) { |
49 | push @code, "weaken( \$instance->{\$key} ) if ref( \$instance->{\$key} );"; |
50 | } |
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51 | if ( $attr->has_trigger ) { |
52 | push @code, "\$attr->trigger->( \$instance, \$args->{\$from}, \$attr );"; |
53 | } |
54 | join "\n", @code; |
55 | }; |
56 | my $part2 = do { |
57 | my @code; |
58 | if ( $attr->has_default || $attr->has_builder ) { |
59 | unless ( $attr->is_lazy ) { |
60 | my $default = $attr->default; |
61 | my $builder = $attr->builder; |
62 | if ($attr->has_builder) { |
63 | push @code, "my \$value = \$instance->$builder;"; |
64 | } elsif (ref($default) eq 'CODE') { |
65 | push @code, "my \$value = \$attr->default()->();"; |
66 | } else { |
67 | push @code, "my \$value = \$attr->default();"; |
68 | } |
69 | if ($attr->should_coerce) { |
70 | push @code, "\$value = \$attr->coerce_constraint(\$value);"; |
71 | } |
72 | if ($attr->has_type_constraint) { |
73 | push @code, "\$attr->verify_type_constraint(\$value);"; |
74 | } |
75 | push @code, "\$instance->{\$key} = \$value;"; |
76 | if ($attr->is_weak_ref) { |
77 | push @code, "weaken( \$instance->{\$key} ) if ref( \$instance->{\$key} );"; |
78 | } |
79 | } |
80 | join "\n", @code; |
81 | } |
82 | else { |
83 | if ( $attr->is_required ) { |
84 | q{Carp::confess("Attribute (} . $attr->name . q{) is required");}; |
85 | } else { |
86 | "" |
87 | } |
88 | } |
89 | }; |
90 | my $code = <<"..."; |
91 | { |
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92 | my \$attr = \$attrs[$index]; |
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93 | my \$from = '$from'; |
94 | my \$key = '$key'; |
95 | if (defined(\$from) && exists(\$args->{\$from})) { |
96 | $part1; |
97 | } else { |
98 | $part2; |
99 | } |
100 | } |
101 | ... |
102 | push @res, $code; |
103 | } |
104 | return join "\n", @res; |
105 | } |
106 | |
107 | sub _generate_BUILDARGS { |
108 | <<'...'; |
109 | do { |
110 | if ( scalar @_ == 1 ) { |
111 | if ( defined $_[0] ) { |
112 | ( ref( $_[0] ) eq 'HASH' ) |
113 | || Carp::confess "Single parameters to new() must be a HASH ref"; |
114 | +{ %{ $_[0] } }; |
115 | } |
116 | else { |
117 | +{}; |
118 | } |
119 | } |
120 | else { |
121 | +{@_}; |
122 | } |
123 | }; |
124 | ... |
125 | } |
126 | |
127 | sub _generate_BUILDALL { |
128 | my ($class, $meta) = @_; |
129 | return '' unless $meta->name->can('BUILD'); |
130 | |
131 | my @code = (); |
132 | push @code, q{no strict 'refs';}; |
133 | push @code, q{no warnings 'once';}; |
134 | no strict 'refs'; |
135 | for my $class ($meta->linearized_isa) { |
136 | if (*{ $class . '::BUILD' }{CODE}) { |
137 | push @code, qq{${class}::BUILD->(\$instance, \$args);}; |
138 | } |
139 | } |
140 | return join "\n", @code; |
141 | } |
142 | |
143 | 1; |