Commit | Line | Data |
6f68f022 |
1 | package Method::Generate::Constructor; |
2 | |
3 | use strictures 1; |
4 | use Sub::Quote; |
5 | use base qw(Class::Tiny::Object); |
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6 | use Sub::Defer; |
a16d301e |
7 | use B 'perlstring'; |
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8 | |
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9 | sub register_attribute_specs { |
10 | my ($self, %spec) = @_; |
11 | @{$self->{attribute_specs}||={}}{keys %spec} = values %spec; |
12 | $self; |
13 | } |
14 | |
15 | sub all_attribute_specs { |
16 | $_[0]->{attribute_specs} |
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17 | } |
18 | |
a16d301e |
19 | sub accessor_generator { |
20 | $_[0]->{accessor_generator} |
21 | } |
22 | |
14f32032 |
23 | sub install_delayed { |
24 | my ($self) = @_; |
25 | my $package = $self->{package}; |
26 | defer_sub "${package}::new" => sub { |
27 | unquote_sub $self->generate_method( |
28 | $package, 'new', $self->{attribute_specs}, { no_install => 1 } |
29 | ) |
30 | }; |
31 | $self; |
32 | } |
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33 | |
34 | sub generate_method { |
35 | my ($self, $into, $name, $spec, $quote_opts) = @_; |
36 | foreach my $no_init (grep !exists($spec->{$_}{init_arg}), keys %$spec) { |
37 | $spec->{$no_init}{init_arg} = $no_init; |
38 | } |
a16d301e |
39 | local $self->{captures} = {}; |
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40 | my $body = ' my $class = shift;'."\n"; |
41 | $body .= $self->_generate_args; |
42 | $body .= $self->_check_required($spec); |
6d377074 |
43 | $body .= $self->_check_isa($spec); |
6f68f022 |
44 | $body .= ' my $new = bless({}, $class);'."\n"; |
45 | $body .= $self->_assign_new($spec); |
a16d301e |
46 | $body .= $self->_fire_triggers($spec); |
4053679e |
47 | $body .= ' return $new;'."\n"; |
6f68f022 |
48 | quote_sub |
4053679e |
49 | "${into}::${name}" => $body, |
a16d301e |
50 | $self->{captures}, $quote_opts||{} |
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51 | ; |
52 | } |
53 | |
54 | sub _generate_args { |
55 | my ($self) = @_; |
56 | q{ my $args = ref($_[0]) eq 'HASH' ? $_[0] : { @_ };}."\n"; |
57 | } |
58 | |
59 | sub _assign_new { |
60 | my ($self, $spec) = @_; |
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61 | my (@init, @slots, %test); |
62 | NAME: foreach my $name (sort keys %$spec) { |
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63 | my $attr_spec = $spec->{$name}; |
46389f86 |
64 | next NAME unless defined(my $i = $attr_spec->{init_arg}); |
649ac264 |
65 | if ($attr_spec->{lazy} or $attr_spec->{default} or $attr_spec->{builder}) { |
46389f86 |
66 | $test{$name} = $i; |
67 | next NAME; |
68 | } |
69 | push @init, $i; |
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70 | push @slots, $name; |
71 | } |
649ac264 |
72 | return '' unless @init or %test; |
46389f86 |
73 | join '', ( |
74 | @init |
75 | ? ' @{$new}{qw('.join(' ',@slots).')}' |
76 | .' = @{$args}{qw('.join(' ',@init).')};'."\n" |
77 | : '' |
78 | ), map { |
79 | my $arg_key = perlstring($test{$_}); |
649ac264 |
80 | my $ag = $self->accessor_generator; |
81 | my $test = "exists \$args->{$arg_key}"; |
82 | my $source = "\$args->{$arg_key}"; |
83 | my $attr_spec = $spec->{$_}; |
84 | my ($code, $add_captures); |
85 | if (!$attr_spec->{lazy} and |
86 | ($attr_spec->{default} or $attr_spec->{builder})) { |
87 | my $get_captures; |
88 | ($code, $add_captures) = $ag->generate_simple_set( |
89 | '$new', $_, |
90 | "(\n ${test}\n ? ${source}\n : " |
91 | .do { |
92 | (my $get, $get_captures) = $ag->generate_get_default( |
93 | '$new', $_, $attr_spec |
94 | ); |
95 | $get; |
96 | } |
97 | ."\n )" |
98 | ); |
99 | @{$add_captures}{keys %$get_captures} = values %$get_captures; |
100 | $code .= ";\n"; |
101 | } else { |
102 | ($code, $add_captures) = $ag->generate_simple_set( |
103 | '$new', $_, "\$args->{$arg_key}" |
104 | ); |
105 | $code .= " if ${test};\n"; |
106 | } |
107 | @{$self->{captures}}{keys %$add_captures} = values %$add_captures; |
108 | ' '.$code; |
46389f86 |
109 | } sort keys %test; |
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110 | } |
111 | |
112 | sub _check_required { |
113 | my ($self, $spec) = @_; |
114 | my @required_init = |
115 | map $spec->{$_}{init_arg}, |
116 | grep $spec->{$_}{required}, |
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117 | sort keys %$spec; |
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118 | return '' unless @required_init; |
119 | ' if (my @missing = grep !exists $args->{$_}, qw(' |
120 | .join(' ',@required_init).')) {'."\n" |
121 | .q{ die "Missing required arguments: ".join(', ', sort @missing);}."\n" |
122 | ." }\n"; |
123 | } |
124 | |
6d377074 |
125 | sub _check_isa { |
126 | my ($self, $spec) = @_; |
127 | my $acc = $self->accessor_generator; |
128 | my $captures = $self->{captures}; |
129 | my $check = ''; |
130 | foreach my $name (sort keys %$spec) { |
131 | my ($init, $isa) = @{$spec->{$name}}{qw(init_arg isa)}; |
132 | next unless $init and $isa; |
133 | my $init_str = perlstring($init); |
134 | my ($code, $add_captures) = $acc->generate_isa_check( |
135 | $name, "\$args->{${init_str}}", $isa |
136 | ); |
137 | @{$captures}{keys %$add_captures} = values %$add_captures; |
649ac264 |
138 | $check .= " ${code}".( |
139 | (not($spec->{lazy}) and ($spec->{default} or $spec->{builder}) |
140 | ? ";\n" |
141 | : "if exists \$args->{${init_str}};\n" |
142 | ) |
143 | ); |
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144 | } |
145 | return $check; |
146 | } |
147 | |
a16d301e |
148 | sub _fire_triggers { |
149 | my ($self, $spec) = @_; |
a16d301e |
150 | my $acc = $self->accessor_generator; |
151 | my $captures = $self->{captures}; |
152 | my $fire = ''; |
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153 | foreach my $name (sort keys %$spec) { |
a16d301e |
154 | my ($init, $trigger) = @{$spec->{$name}}{qw(init_arg trigger)}; |
155 | next unless $init && $trigger; |
156 | my ($code, $add_captures) = $acc->generate_trigger( |
157 | $name, '$new', $acc->generate_simple_get('$new', $name), $trigger |
158 | ); |
159 | @{$captures}{keys %$add_captures} = values %$add_captures; |
160 | $fire .= " ${code} if exists \$args->{${\perlstring $init}};\n"; |
161 | } |
162 | return $fire; |
163 | } |
164 | |
6f68f022 |
165 | 1; |