1 package Method::Generate::Accessor;
4 use Class::Tiny::_Utils;
5 use base qw(Class::Tiny::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} = {};
18 local $self->{into} = $into; # for XS gen
21 $self->_generate_get($name, $spec)
22 } elsif ($is eq 'rw') {
23 $self->_generate_getset($name, $spec)
25 die "Unknown is ${is}";
28 if (my $pred = $spec->{predicate}) {
29 quote_sub "${into}::${pred}" =>
30 ' '.$self->_generate_simple_has('$_[0]', $name)."\n"
33 if (my $cl = $spec->{clearer}) {
34 quote_sub "${into}::${cl}" =>
35 " delete \$_[0]->{${\perlstring $name}}\n"
38 return $body if ref($body); # optimiferised
40 "${into}::${name}" => ' '.$body."\n",
41 $self->{captures}, $quote_opts||{}
45 sub is_simple_attribute {
46 my ($self, $name, $spec) = @_;
47 # clearer doesn't have to be listed because it doesn't
48 # affect whether defined/exists makes a difference
49 return !grep $spec->{$_},
50 qw(lazy default builder isa trigger predicate);
54 my ($self, $name, $spec) = @_;
55 return !($spec->{lazy} and ($spec->{default} or $spec->{builder}));
59 my ($self, $name, $spec) = @_;
60 return !grep $spec->{$_}, qw(isa trigger);
64 my ($self, $name, $spec) = @_;
65 if (our $CAN_HAZ_XS && $self->is_simple_get($name, $spec)) {
66 return $self->_generate_xs_get($name);
68 my $simple = $self->_generate_simple_get('$_[0]', $name);
69 my ($lazy, $default, $builder) = @{$spec}{qw(lazy default builder)};
70 return $simple unless $lazy and ($default or $builder);
71 'do { '.$self->_generate_use_default(
72 '$_[0]', $name, $spec,
73 $self->_generate_simple_has('$_[0]', $name),
77 sub _generate_simple_has {
78 my ($self, $me, $name) = @_;
79 "exists ${me}->{${\perlstring $name}}";
82 sub generate_get_default {
84 local $self->{captures} = {};
85 my $code = $self->_generate_get_default(@_);
86 return ($code, $self->{captures});
89 sub _generate_use_default {
90 my ($self, $me, $name, $spec, $test) = @_;
91 $self->_generate_simple_set(
92 $me, $name, $self->_generate_get_default($me, $name, $spec)
96 sub _generate_get_default {
97 my ($self, $me, $name, $spec) = @_;
99 ? $self->_generate_call_code($name, 'default', $me, $spec->{default})
100 : "${me}->${\$spec->{builder}}"
103 sub generate_simple_get {
104 shift->_generate_simple_get(@_);
107 sub _generate_simple_get {
108 my ($self, $me, $name) = @_;
109 my $name_str = perlstring $name;
110 "${me}->{${name_str}}";
114 my ($self, $name, $value, $spec) = @_;
115 my $simple = $self->_generate_simple_set('$_[0]', $name, $value);
116 my ($trigger, $isa_check) = @{$spec}{qw(trigger isa)};
117 return $simple unless $trigger or $isa_check;
120 $code .= ' '.$self->_generate_isa_check($name, '$_[1]', $isa_check).';';
123 my $fire = $self->_generate_trigger($name, '$_[0]', '$value', $trigger);
125 ' my $value = '.$simple.'; '.$fire.'; '
128 $code .= ' '.$simple;
134 sub generate_trigger {
136 local $self->{captures} = {};
137 my $code = $self->_generate_trigger(@_);
138 return ($code, $self->{captures});
141 sub _generate_trigger {
142 my ($self, $name, $obj, $value, $trigger) = @_;
143 $self->_generate_call_code($name, 'trigger', "${obj}, ${value}", $trigger);
146 sub generate_isa_check {
148 local $self->{captures} = {};
149 my $code = $self->_generate_isa_check(@_);
150 return ($code, $self->{captures});
153 sub _generate_isa_check {
154 my ($self, $name, $value, $check) = @_;
155 $self->_generate_call_code($name, 'isa_check', $value, $check);
158 sub _generate_call_code {
159 my ($self, $name, $type, $values, $sub) = @_;
160 if (my $quoted = quoted_from_sub($sub)) {
161 my $code = $quoted->[1];
162 my $at_ = 'local @_ = ('.$values.');';
163 if (my $captures = $quoted->[2]) {
164 my $cap_name = qq{\$${type}_captures_for_${name}};
165 $self->{captures}->{$cap_name} = \$captures;
166 return "do {\n".' '.$at_."\n"
167 .Sub::Quote::capture_unroll($cap_name, $captures, 6)
170 return 'do { local @_ = ('.$values.'); '.$code.' }';
172 my $cap_name = qq{\$${type}_for_${name}};
173 $self->{captures}->{$cap_name} = \$sub;
174 return "${cap_name}->(${values})";
177 sub generate_populate_set {
179 local $self->{captures} = {};
180 my $code = $self->_generate_populate_set(@_);
181 return ($code, $self->{captures});
184 sub _generate_populate_set {
185 my ($self, $me, $name, $spec, $source, $test) = @_;
186 if (!$spec->{lazy} and
187 ($spec->{default} or $spec->{builder})) {
188 my $get_indent = ' ' x ($spec->{isa} ? 6 : 4);
190 "(\n${get_indent} ${test}\n${get_indent} ? ${source}\n${get_indent} : "
191 .$self->_generate_get_default(
196 ? " {\n my \$value = ".$get_value.";\n "
197 .$self->_generate_isa_check(
198 $name, '$value', $spec->{isa}
200 .' '.$self->_generate_simple_set($me, $name, '$value').";\n"
202 : ' '.$self->_generate_simple_set($me, $name, $get_value).";\n"
206 .$self->_generate_trigger(
207 $name, $me, $self->_generate_simple_get($me, $name),
216 .$self->_generate_isa_check(
217 $name, $source, $spec->{isa}
221 ." ".$self->_generate_simple_set($me, $name, $source).";\n"
224 .$self->_generate_trigger(
225 $name, $me, $self->_generate_simple_get($me, $name),
234 sub generate_multi_set {
235 my ($self, $me, $to_set, $from) = @_;
236 "\@{${me}}{qw(${\join ' ', @$to_set})} = $from";
239 sub generate_simple_set {
241 local $self->{captures} = {};
242 my $code = $self->_generate_simple_set(@_);
243 return ($code, $self->{captures});
246 sub _generate_simple_set {
247 my ($self, $me, $name, $value) = @_;
248 my $name_str = perlstring $name;
249 "${me}->{${name_str}} = ${value}";
252 sub _generate_getset {
253 my ($self, $name, $spec) = @_;
256 && $self->is_simple_get($name, $spec)
257 && $self->is_simple_set($name, $spec)
259 return $self->_generate_xs_getset($name);
261 q{(@_ > 1 ? }.$self->_generate_set($name, q{$_[1]}, $spec)
262 .' : '.$self->_generate_get($name).')';
265 sub _generate_xs_get {
266 shift->_generate_xs('getters', @_);
269 sub _generate_xs_getset {
270 shift->_generate_xs('accessors', @_);
274 my ($self, $type, $name) = @_;
276 Class::XSAccessor->import(
277 class => $self->{into},
278 $type => { $name => $name }
280 return $self->{into}->can($name);