1 package Method::Generate::Accessor;
5 use base qw(Moo::Object);
9 our $CAN_HAZ_XS = ($^O ne 'Win32')
10 && _maybe_load_module('Class::XSAccessor')
11 && (Class::XSAccessor->VERSION > 1.06);
15 my ($self, $into, $name, $spec, $quote_opts) = @_;
16 die "Must have an is" unless my $is = $spec->{is};
17 local $self->{captures} = {};
20 if (our $CAN_HAZ_XS && $self->is_simple_get($name, $spec)) {
21 $self->_generate_xs_get($into, $name);
23 $self->_generate_get($name, $spec)
25 } elsif ($is eq 'rw') {
28 && $self->is_simple_get($name, $spec)
29 && $self->is_simple_set($name, $spec)
31 $self->_generate_xs_getset($into, $name);
33 $self->_generate_getset($name, $spec)
36 die "Unknown is ${is}";
39 if (my $pred = $spec->{predicate}) {
40 quote_sub "${into}::${pred}" =>
41 ' '.$self->_generate_simple_has('$_[0]', $name)."\n"
44 if (my $cl = $spec->{clearer}) {
45 quote_sub "${into}::${cl}" =>
46 " delete \$_[0]->{${\perlstring $name}}\n"
49 return $body if ref($body); # optimiferised
51 "${into}::${name}" => ' '.$body."\n",
52 $self->{captures}, $quote_opts||{}
56 sub is_simple_attribute {
57 my ($self, $name, $spec) = @_;
58 # clearer doesn't have to be listed because it doesn't
59 # affect whether defined/exists makes a difference
60 return !grep $spec->{$_},
61 qw(lazy default builder isa trigger predicate);
65 my ($self, $name, $spec) = @_;
66 return !($spec->{lazy} and ($spec->{default} or $spec->{builder}));
70 my ($self, $name, $spec) = @_;
71 return !grep $spec->{$_}, qw(isa trigger);
75 my ($self, $name, $spec) = @_;
76 my $simple = $self->_generate_simple_get('$_[0]', $name);
77 my ($lazy, $default, $builder) = @{$spec}{qw(lazy default builder)};
78 return $simple unless $lazy and ($default or $builder);
79 'do { '.$self->_generate_use_default(
80 '$_[0]', $name, $spec,
81 $self->_generate_simple_has('$_[0]', $name),
85 sub _generate_simple_has {
86 my ($self, $me, $name) = @_;
87 "exists ${me}->{${\perlstring $name}}";
90 sub generate_get_default {
92 local $self->{captures} = {};
93 my $code = $self->_generate_get_default(@_);
94 return ($code, $self->{captures});
97 sub _generate_use_default {
98 my ($self, $me, $name, $spec, $test) = @_;
99 $self->_generate_simple_set(
100 $me, $name, $self->_generate_get_default($me, $name, $spec)
104 sub _generate_get_default {
105 my ($self, $me, $name, $spec) = @_;
107 ? $self->_generate_call_code($name, 'default', $me, $spec->{default})
108 : "${me}->${\$spec->{builder}}"
111 sub generate_simple_get {
112 shift->_generate_simple_get(@_);
115 sub _generate_simple_get {
116 my ($self, $me, $name) = @_;
117 my $name_str = perlstring $name;
118 "${me}->{${name_str}}";
122 my ($self, $name, $value, $spec) = @_;
123 my $simple = $self->_generate_simple_set('$_[0]', $name, $value);
124 my ($trigger, $isa_check) = @{$spec}{qw(trigger isa)};
125 return $simple unless $trigger or $isa_check;
129 " ".$self->_generate_isa_check($name, '$_[1]', $isa_check).";\n";
132 my $fire = $self->_generate_trigger($name, '$_[0]', '$value', $trigger);
134 " my \$value = ".$simple.";\n ".$fire.";\n"
137 $code .= " ".$simple.";\n";
143 sub generate_trigger {
145 local $self->{captures} = {};
146 my $code = $self->_generate_trigger(@_);
147 return ($code, $self->{captures});
150 sub _generate_trigger {
151 my ($self, $name, $obj, $value, $trigger) = @_;
152 $self->_generate_call_code($name, 'trigger', "${obj}, ${value}", $trigger);
155 sub generate_isa_check {
157 local $self->{captures} = {};
158 my $code = $self->_generate_isa_check(@_);
159 return ($code, $self->{captures});
162 sub _generate_isa_check {
163 my ($self, $name, $value, $check) = @_;
164 $self->_generate_call_code($name, 'isa_check', $value, $check);
167 sub _generate_call_code {
168 my ($self, $name, $type, $values, $sub) = @_;
169 if (my $quoted = quoted_from_sub($sub)) {
170 my $code = $quoted->[1];
171 my $at_ = 'local @_ = ('.$values.');';
172 if (my $captures = $quoted->[2]) {
173 my $cap_name = qq{\$${type}_captures_for_${name}};
174 $self->{captures}->{$cap_name} = \$captures;
175 return "do {\n".' '.$at_."\n"
176 .Sub::Quote::capture_unroll($cap_name, $captures, 6)
179 return 'do { local @_ = ('.$values.'); '.$code.' }';
181 my $cap_name = qq{\$${type}_for_${name}};
182 $self->{captures}->{$cap_name} = \$sub;
183 return "${cap_name}->(${values})";
186 sub generate_populate_set {
188 local $self->{captures} = {};
189 my $code = $self->_generate_populate_set(@_);
190 return ($code, $self->{captures});
193 sub _generate_populate_set {
194 my ($self, $me, $name, $spec, $source, $test) = @_;
195 if (!$spec->{lazy} and
196 ($spec->{default} or $spec->{builder})) {
197 my $get_indent = ' ' x ($spec->{isa} ? 6 : 4);
199 "(\n${get_indent} ${test}\n${get_indent} ? ${source}\n${get_indent} : "
200 .$self->_generate_get_default(
205 ? " {\n my \$value = ".$get_value.";\n "
206 .$self->_generate_isa_check(
207 $name, '$value', $spec->{isa}
209 .' '.$self->_generate_simple_set($me, $name, '$value').";\n"
211 : ' '.$self->_generate_simple_set($me, $name, $get_value).";\n"
215 .$self->_generate_trigger(
216 $name, $me, $self->_generate_simple_get($me, $name),
225 .$self->_generate_isa_check(
226 $name, $source, $spec->{isa}
230 ." ".$self->_generate_simple_set($me, $name, $source).";\n"
233 .$self->_generate_trigger(
234 $name, $me, $self->_generate_simple_get($me, $name),
243 sub generate_multi_set {
244 my ($self, $me, $to_set, $from) = @_;
245 "\@{${me}}{qw(${\join ' ', @$to_set})} = $from";
248 sub generate_simple_set {
250 local $self->{captures} = {};
251 my $code = $self->_generate_simple_set(@_);
252 return ($code, $self->{captures});
255 sub _generate_simple_set {
256 my ($self, $me, $name, $value) = @_;
257 my $name_str = perlstring $name;
258 "${me}->{${name_str}} = ${value}";
261 sub _generate_getset {
262 my ($self, $name, $spec) = @_;
263 q{(@_ > 1}."\n ? ".$self->_generate_set($name, q{$_[1]}, $spec)
264 ."\n : ".$self->_generate_get($name)."\n )";
267 sub _generate_xs_get {
268 shift->_generate_xs('getters', @_);
271 sub _generate_xs_getset {
272 shift->_generate_xs('accessors', @_);
276 my ($self, $type, $into, $name) = @_;
278 Class::XSAccessor->import(
280 $type => { $name => $name }
282 return $into->can($name);