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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; # 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; |
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39 | |
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40 | my $part1 = do { |
41 | my @code; |
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42 | |
43 | push @code, "my \$value = \$args->{'$from'};"; |
44 | |
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45 | if ($attr->should_coerce) { |
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46 | push @code, "\$value = \$attr->coerce_constraint( \$value );"; |
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47 | } |
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48 | |
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49 | if ($attr->has_type_constraint) { |
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50 | push @code, "\$attr->verify_type_constraint( \$value );"; |
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51 | } |
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52 | |
53 | push @code, "\$instance->{'$key'} = \$value;"; |
54 | |
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55 | if ($attr->is_weak_ref) { |
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56 | push @code, "weaken( \$instance->{'$key'} ) if ref( \$value );"; |
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57 | } |
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58 | |
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59 | if ( $attr->has_trigger ) { |
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60 | push @code, "\$attr->trigger->( \$instance, \$value, \$attr );"; |
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61 | } |
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62 | |
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63 | join "\n", @code; |
64 | }; |
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65 | |
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66 | my $part2 = do { |
67 | my @code; |
68 | if ( $attr->has_default || $attr->has_builder ) { |
69 | unless ( $attr->is_lazy ) { |
70 | my $default = $attr->default; |
71 | my $builder = $attr->builder; |
72 | if ($attr->has_builder) { |
73 | push @code, "my \$value = \$instance->$builder;"; |
74 | } elsif (ref($default) eq 'CODE') { |
75 | push @code, "my \$value = \$attr->default()->();"; |
76 | } else { |
77 | push @code, "my \$value = \$attr->default();"; |
78 | } |
79 | if ($attr->should_coerce) { |
80 | push @code, "\$value = \$attr->coerce_constraint(\$value);"; |
81 | } |
82 | if ($attr->has_type_constraint) { |
83 | push @code, "\$attr->verify_type_constraint(\$value);"; |
84 | } |
8dcbf65d |
85 | push @code, "\$instance->{'$key'} = \$value;"; |
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86 | if ($attr->is_weak_ref) { |
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87 | push @code, "weaken( \$instance->{'$key'} ) if ref( \$instance->{'$key'} );"; |
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88 | } |
89 | } |
90 | join "\n", @code; |
91 | } |
92 | else { |
93 | if ( $attr->is_required ) { |
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94 | qq{Carp::confess("Attribute ($key) is required");}; |
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95 | } else { |
96 | "" |
97 | } |
98 | } |
99 | }; |
100 | my $code = <<"..."; |
101 | { |
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102 | my \$attr = \$attrs[$index]; |
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103 | if (exists(\$args->{'$from'})) { |
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104 | $part1; |
105 | } else { |
106 | $part2; |
107 | } |
108 | } |
109 | ... |
110 | push @res, $code; |
111 | } |
112 | return join "\n", @res; |
113 | } |
114 | |
115 | sub _generate_BUILDARGS { |
116 | <<'...'; |
117 | do { |
118 | if ( scalar @_ == 1 ) { |
119 | if ( defined $_[0] ) { |
120 | ( ref( $_[0] ) eq 'HASH' ) |
121 | || Carp::confess "Single parameters to new() must be a HASH ref"; |
122 | +{ %{ $_[0] } }; |
123 | } |
124 | else { |
125 | +{}; |
126 | } |
127 | } |
128 | else { |
129 | +{@_}; |
130 | } |
131 | }; |
132 | ... |
133 | } |
134 | |
135 | sub _generate_BUILDALL { |
136 | my ($class, $meta) = @_; |
137 | return '' unless $meta->name->can('BUILD'); |
138 | |
139 | my @code = (); |
140 | push @code, q{no strict 'refs';}; |
141 | push @code, q{no warnings 'once';}; |
142 | no strict 'refs'; |
143 | for my $class ($meta->linearized_isa) { |
144 | if (*{ $class . '::BUILD' }{CODE}) { |
145 | push @code, qq{${class}::BUILD->(\$instance, \$args);}; |
146 | } |
147 | } |
148 | return join "\n", @code; |
149 | } |
150 | |
151 | 1; |