1 package Method::Generate::Accessor;
4 use Class::Tiny::_Utils;
5 use base qw(Class::Tiny::Object);
10 my ($self, $into, $name, $spec, $quote_opts) = @_;
11 die "Must have an is" unless my $is = $spec->{is};
12 local $self->{captures} = {};
15 $self->_generate_get($name, $spec)
16 } elsif ($is eq 'rw') {
17 $self->_generate_getset($name, $spec)
19 die "Unknown is ${is}";
22 if (my $pred = $spec->{predicate}) {
23 quote_sub "${into}::${pred}" =>
24 ' '.$self->_generate_simple_has('$_[0]', $name)."\n"
27 if (my $cl = $spec->{clearer}) {
28 quote_sub "${into}::${cl}" =>
29 " delete \$_[0]->{${\perlstring $name}}\n"
33 "${into}::${name}" => ' '.$body."\n",
34 $self->{captures}, $quote_opts||{}
38 sub is_simple_attribute {
39 my ($self, $name, $spec) = @_;
40 # clearer doesn't have to be listed because it doesn't
41 # affect whether defined/exists makes a difference
42 return !grep $spec->{$_},
43 qw(lazy default builder isa trigger predicate);
47 my ($self, $name, $spec) = @_;
48 my $simple = $self->_generate_simple_get('$_[0]', $name);
49 my ($lazy, $default, $builder) = @{$spec}{qw(lazy default builder)};
50 return $simple unless $lazy and ($default or $builder);
51 'do { '.$self->_generate_use_default(
52 '$_[0]', $name, $spec,
53 $self->_generate_simple_has('$_[0]', $name),
57 sub _generate_simple_has {
58 my ($self, $me, $name) = @_;
59 "exists ${me}->{${\perlstring $name}}";
62 sub generate_get_default {
64 local $self->{captures} = {};
65 my $code = $self->_generate_get_default(@_);
66 return ($code, $self->{captures});
69 sub _generate_use_default {
70 my ($self, $me, $name, $spec, $test) = @_;
71 $self->_generate_simple_set(
72 $me, $name, $self->_generate_get_default($me, $name, $spec)
76 sub _generate_get_default {
77 my ($self, $me, $name, $spec) = @_;
79 ? $self->_generate_call_code($name, 'default', $me, $spec->{default})
80 : "${me}->${\$spec->{builder}}"
83 sub generate_simple_get {
84 shift->_generate_simple_get(@_);
87 sub _generate_simple_get {
88 my ($self, $me, $name) = @_;
89 my $name_str = perlstring $name;
90 "${me}->{${name_str}}";
94 my ($self, $name, $value, $spec) = @_;
95 my $simple = $self->_generate_simple_set('$_[0]', $name, $value);
96 my ($trigger, $isa_check) = @{$spec}{qw(trigger isa)};
97 return $simple unless $trigger or $isa_check;
100 $code .= ' '.$self->_generate_isa_check($name, '$_[1]', $isa_check).';';
103 my $fire = $self->_generate_trigger($name, '$_[0]', '$value', $trigger);
105 ' my $value = '.$simple.'; '.$fire.'; '
108 $code .= ' '.$simple;
114 sub generate_trigger {
116 local $self->{captures} = {};
117 my $code = $self->_generate_trigger(@_);
118 return ($code, $self->{captures});
121 sub _generate_trigger {
122 my ($self, $name, $obj, $value, $trigger) = @_;
123 $self->_generate_call_code($name, 'trigger', "${obj}, ${value}", $trigger);
126 sub generate_isa_check {
128 local $self->{captures} = {};
129 my $code = $self->_generate_isa_check(@_);
130 return ($code, $self->{captures});
133 sub _generate_isa_check {
134 my ($self, $name, $value, $check) = @_;
135 $self->_generate_call_code($name, 'isa_check', $value, $check);
138 sub _generate_call_code {
139 my ($self, $name, $type, $values, $sub) = @_;
140 if (my $quoted = quoted_from_sub($sub)) {
141 my $code = $quoted->[1];
142 my $at_ = 'local @_ = ('.$values.');';
143 if (my $captures = $quoted->[2]) {
144 my $cap_name = qq{\$${type}_captures_for_${name}};
145 $self->{captures}->{$cap_name} = \$captures;
146 return "do {\n".' '.$at_."\n"
147 .Sub::Quote::capture_unroll($cap_name, $captures, 6)
150 return 'do { local @_ = ('.$values.'); '.$code.' }';
152 my $cap_name = qq{\$${type}_for_${name}};
153 $self->{captures}->{$cap_name} = \$sub;
154 return "${cap_name}->(${values})";
157 sub generate_populate_set {
159 local $self->{captures} = {};
160 my $code = $self->_generate_populate_set(@_);
161 return ($code, $self->{captures});
164 sub _generate_populate_set {
165 my ($self, $me, $name, $spec, $source, $test) = @_;
166 if (!$spec->{lazy} and
167 ($spec->{default} or $spec->{builder})) {
168 my $get_indent = ' ' x ($spec->{isa} ? 6 : 4);
170 "(\n${get_indent} ${test}\n${get_indent} ? ${source}\n${get_indent} : "
171 .$self->_generate_get_default(
176 ? " {\n my \$value = ".$get_value.";\n "
177 .$self->_generate_isa_check(
178 $name, '$value', $spec->{isa}
180 .' '.$self->_generate_simple_set($me, $name, '$value').";\n"
182 : ' '.$self->_generate_simple_set($me, $name, $get_value).";\n"
186 .$self->_generate_trigger(
187 $name, $me, $self->_generate_simple_get($me, $name),
196 .$self->_generate_isa_check(
197 $name, $source, $spec->{isa}
201 ." ".$self->_generate_simple_set($me, $name, $source).";\n"
204 .$self->_generate_trigger(
205 $name, $me, $self->_generate_simple_get($me, $name),
214 sub generate_multi_set {
215 my ($self, $me, $to_set, $from) = @_;
216 "\@{${me}}{qw(${\join ' ', @$to_set})} = $from";
219 sub generate_simple_set {
221 local $self->{captures} = {};
222 my $code = $self->_generate_simple_set(@_);
223 return ($code, $self->{captures});
226 sub _generate_simple_set {
227 my ($self, $me, $name, $value) = @_;
228 my $name_str = perlstring $name;
229 "${me}->{${name_str}} = ${value}";
232 sub _generate_getset {
233 my ($self, $name, $spec) = @_;
234 q{(@_ > 1 ? }.$self->_generate_set($name, q{$_[1]}, $spec)
235 .' : '.$self->_generate_get($name).')';