Commit | Line | Data |
51a3b106 |
1 | package Method::Generate::Accessor; |
2 | |
3 | use strictures 1; |
b1eebd55 |
4 | use Moo::_Utils; |
5 | use base qw(Moo::Object); |
51a3b106 |
6 | use Sub::Quote; |
7 | use B 'perlstring'; |
daa05b62 |
8 | BEGIN { |
6e294299 |
9 | our $CAN_HAZ_XS = |
10 | _maybe_load_module('Class::XSAccessor') |
11 | && |
12 | (Class::XSAccessor->VERSION > 1.06) |
13 | ; |
daa05b62 |
14 | } |
51a3b106 |
15 | |
316917c9 |
16 | sub generate_method { |
6f68f022 |
17 | my ($self, $into, $name, $spec, $quote_opts) = @_; |
51a3b106 |
18 | die "Must have an is" unless my $is = $spec->{is}; |
dcae37d3 |
19 | if ($is eq 'ro') { |
20 | $spec->{reader} = $name unless exists $spec->{reader}; |
21 | } elsif ($is eq 'rw') { |
22 | $spec->{accessor} = $name unless exists $spec->{accessor}; |
23 | } elsif ($is eq 'lazy') { |
24 | $spec->{init_arg} = undef unless exists $spec->{init_arg}; |
25 | $spec->{reader} = $name unless exists $spec->{reader}; |
26 | $spec->{lazy} = 1; |
27 | $spec->{builder} ||= '_build_'.$name unless $spec->{default}; |
28 | } elsif ($is ne 'bare') { |
29 | die "Unknown is ${is}"; |
30 | } |
31 | my %methods; |
32 | if (my $reader = $spec->{reader}) { |
33 | if (our $CAN_HAZ_XS && $self->is_simple_get($name, $spec)) { |
34 | $methods{$reader} = $self->_generate_xs( |
35 | getters => $into, $reader, $name |
36 | ); |
37 | } else { |
e57f338d |
38 | $self->{captures} = {}; |
dcae37d3 |
39 | $methods{$reader} = |
40 | quote_sub "${into}::${reader}" |
41 | => $self->_generate_get($name, $spec) |
e57f338d |
42 | => delete $self->{captures} |
dcae37d3 |
43 | ; |
44 | } |
45 | } |
46 | if (my $accessor = $spec->{accessor}) { |
47 | if ( |
48 | our $CAN_HAZ_XS |
49 | && $self->is_simple_get($name, $spec) |
50 | && $self->is_simple_set($name, $spec) |
51 | ) { |
52 | $methods{$accessor} = $self->_generate_xs( |
53 | accessors => $into, $accessor, $name |
54 | ); |
55 | } else { |
e57f338d |
56 | $self->{captures} = {}; |
dcae37d3 |
57 | $methods{$accessor} = |
58 | quote_sub "${into}::${accessor}" |
59 | => $self->_generate_getset($name, $spec) |
e57f338d |
60 | => delete $self->{captures} |
dcae37d3 |
61 | ; |
62 | } |
63 | } |
64 | if (my $writer = $spec->{writer}) { |
65 | if ( |
66 | our $CAN_HAZ_XS |
67 | && $self->is_simple_set($name, $spec) |
68 | ) { |
69 | $methods{$writer} = $self->_generate_xs( |
70 | setters => $into, $writer, $name |
71 | ); |
51a3b106 |
72 | } else { |
e57f338d |
73 | $self->{captures} = {}; |
dcae37d3 |
74 | $methods{$writer} = |
75 | quote_sub "${into}::${writer}" |
76 | => $self->_generate_set($name, $spec) |
e57f338d |
77 | => delete $self->{captures} |
dcae37d3 |
78 | ; |
51a3b106 |
79 | } |
dcae37d3 |
80 | } |
8f333548 |
81 | if (my $pred = $spec->{predicate}) { |
dcae37d3 |
82 | $methods{$pred} = |
83 | quote_sub "${into}::${pred}" => |
84 | ' '.$self->_generate_simple_has('$_[0]', $name)."\n" |
85 | ; |
8f333548 |
86 | } |
87 | if (my $cl = $spec->{clearer}) { |
dcae37d3 |
88 | $methods{$cl} = |
89 | quote_sub "${into}::${cl}" => |
90 | " delete \$_[0]->{${\perlstring $name}}\n" |
91 | ; |
901efe1a |
92 | } |
4db3a740 |
93 | if (my $hspec = $spec->{handles}) { |
94 | my $asserter = $spec->{asserter} ||= '_assert_'.$name; |
95 | my @specs = do { |
96 | if (ref($hspec) eq 'ARRAY') { |
97 | map [ $_ => $_ ], @$hspec; |
98 | } elsif (ref($hspec) eq 'HASH') { |
99 | map [ $_ => ref($hspec->{$_}) ? @{$hspec->{$_}} : $hspec->{$_} ], |
100 | keys %$hspec; |
101 | } elsif (!ref($hspec)) { |
102 | map [ $_ => $_ ], Role::Tiny->methods_provided_by($hspec); |
103 | } else { |
104 | die "You gave me a handles of ${hspec} and I have no idea why"; |
105 | } |
106 | }; |
107 | foreach my $spec (@specs) { |
108 | my ($proxy, $target, @args) = @$spec; |
e57f338d |
109 | $self->{captures} = {}; |
4db3a740 |
110 | $methods{$proxy} = |
111 | quote_sub "${into}::${proxy}" => |
112 | $self->_generate_delegation($asserter, $target, \@args), |
e57f338d |
113 | delete $self->{captures} |
4db3a740 |
114 | ; |
115 | } |
116 | } |
117 | if (my $asserter = $spec->{asserter}) { |
e57f338d |
118 | $self->{captures} = {}; |
4db3a740 |
119 | $methods{$asserter} = |
120 | quote_sub "${into}::${asserter}" => |
121 | 'do { '.$self->_generate_get($name, $spec).qq! }||die "Attempted to access '${name}' but it is not set"!, |
e57f338d |
122 | delete $self->{captures} |
4db3a740 |
123 | ; |
124 | } |
dcae37d3 |
125 | \%methods; |
51a3b106 |
126 | } |
127 | |
3a9a65a4 |
128 | sub is_simple_attribute { |
129 | my ($self, $name, $spec) = @_; |
8f333548 |
130 | # clearer doesn't have to be listed because it doesn't |
131 | # affect whether defined/exists makes a difference |
901efe1a |
132 | !grep $spec->{$_}, |
82a5b146 |
133 | qw(lazy default builder coerce isa trigger predicate weak_ref); |
3a9a65a4 |
134 | } |
135 | |
daa05b62 |
136 | sub is_simple_get { |
137 | my ($self, $name, $spec) = @_; |
901efe1a |
138 | !($spec->{lazy} and ($spec->{default} or $spec->{builder})); |
daa05b62 |
139 | } |
140 | |
141 | sub is_simple_set { |
142 | my ($self, $name, $spec) = @_; |
82a5b146 |
143 | !grep $spec->{$_}, qw(coerce isa trigger weak_ref); |
daa05b62 |
144 | } |
145 | |
4ced3a94 |
146 | sub has_eager_default { |
147 | my ($self, $name, $spec) = @_; |
148 | (!$spec->{lazy} and ($spec->{default} or $spec->{builder})); |
149 | } |
150 | |
51a3b106 |
151 | sub _generate_get { |
46389f86 |
152 | my ($self, $name, $spec) = @_; |
153 | my $simple = $self->_generate_simple_get('$_[0]', $name); |
901efe1a |
154 | if ($self->is_simple_get($name, $spec)) { |
155 | $simple; |
156 | } else { |
157 | 'do { '.$self->_generate_use_default( |
158 | '$_[0]', $name, $spec, |
159 | $self->_generate_simple_has('$_[0]', $name), |
160 | ).'; '.$simple.' }'; |
161 | } |
46389f86 |
162 | } |
163 | |
164 | sub _generate_simple_has { |
165 | my ($self, $me, $name) = @_; |
166 | "exists ${me}->{${\perlstring $name}}"; |
167 | } |
168 | |
649ac264 |
169 | sub generate_get_default { |
170 | my $self = shift; |
e57f338d |
171 | $self->{captures} = {}; |
649ac264 |
172 | my $code = $self->_generate_get_default(@_); |
e57f338d |
173 | ($code, delete $self->{captures}); |
649ac264 |
174 | } |
175 | |
176 | sub _generate_use_default { |
177 | my ($self, $me, $name, $spec, $test) = @_; |
46389f86 |
178 | $self->_generate_simple_set( |
32381de9 |
179 | $me, $name, $spec, $self->_generate_get_default($me, $name, $spec) |
46389f86 |
180 | ).' unless '.$test; |
a16d301e |
181 | } |
182 | |
649ac264 |
183 | sub _generate_get_default { |
184 | my ($self, $me, $name, $spec) = @_; |
185 | $spec->{default} |
186 | ? $self->_generate_call_code($name, 'default', $me, $spec->{default}) |
187 | : "${me}->${\$spec->{builder}}" |
188 | } |
189 | |
a16d301e |
190 | sub generate_simple_get { |
901efe1a |
191 | my ($self, @args) = @_; |
192 | $self->_generate_simple_get(@args); |
a16d301e |
193 | } |
194 | |
195 | sub _generate_simple_get { |
196 | my ($self, $me, $name) = @_; |
197 | my $name_str = perlstring $name; |
198 | "${me}->{${name_str}}"; |
51a3b106 |
199 | } |
200 | |
201 | sub _generate_set { |
dcae37d3 |
202 | my ($self, $name, $spec) = @_; |
901efe1a |
203 | if ($self->is_simple_set($name, $spec)) { |
32381de9 |
204 | $self->_generate_simple_set('$_[0]', $name, $spec, '$_[1]'); |
6d377074 |
205 | } else { |
82a5b146 |
206 | my ($coerce, $trigger, $isa_check) = @{$spec}{qw(coerce trigger isa)}; |
32381de9 |
207 | my $simple = $self->_generate_simple_set('$self', $name, $spec, '$value'); |
e57f338d |
208 | my $code = "do { my (\$self, \$value) = \@_;\n"; |
82a5b146 |
209 | if ($coerce) { |
210 | $code .= |
211 | " \$value = " |
212 | .$self->_generate_coerce($name, '$self', '$value', $coerce).";\n"; |
213 | } |
901efe1a |
214 | if ($isa_check) { |
215 | $code .= |
e57f338d |
216 | " ".$self->_generate_isa_check($name, '$value', $isa_check).";\n"; |
901efe1a |
217 | } |
218 | if ($trigger) { |
e57f338d |
219 | my $fire = $self->_generate_trigger($name, '$self', '$value', $trigger); |
901efe1a |
220 | $code .= |
e57f338d |
221 | " ".$simple.";\n ".$fire.";\n" |
901efe1a |
222 | ." \$value;\n"; |
223 | } else { |
224 | $code .= " ".$simple.";\n"; |
225 | } |
226 | $code .= " }"; |
227 | $code; |
a16d301e |
228 | } |
a16d301e |
229 | } |
82a5b146 |
230 | |
231 | sub generate_coerce { |
232 | my $self = shift; |
233 | $self->{captures} = {}; |
234 | my $code = $self->_generate_coerce(@_); |
235 | ($code, delete $self->{captures}); |
236 | } |
237 | |
238 | sub _generate_coerce { |
239 | my ($self, $name, $obj, $value, $coerce) = @_; |
240 | $self->_generate_call_code($name, 'coerce', "${value}", $coerce); |
241 | } |
242 | |
a16d301e |
243 | sub generate_trigger { |
244 | my $self = shift; |
e57f338d |
245 | $self->{captures} = {}; |
a16d301e |
246 | my $code = $self->_generate_trigger(@_); |
e57f338d |
247 | ($code, delete $self->{captures}); |
a16d301e |
248 | } |
249 | |
250 | sub _generate_trigger { |
251 | my ($self, $name, $obj, $value, $trigger) = @_; |
6d377074 |
252 | $self->_generate_call_code($name, 'trigger', "${obj}, ${value}", $trigger); |
253 | } |
254 | |
255 | sub generate_isa_check { |
901efe1a |
256 | my ($self, @args) = @_; |
e57f338d |
257 | $self->{captures} = {}; |
901efe1a |
258 | my $code = $self->_generate_isa_check(@args); |
e57f338d |
259 | ($code, delete $self->{captures}); |
6d377074 |
260 | } |
261 | |
262 | sub _generate_isa_check { |
263 | my ($self, $name, $value, $check) = @_; |
264 | $self->_generate_call_code($name, 'isa_check', $value, $check); |
265 | } |
266 | |
267 | sub _generate_call_code { |
268 | my ($self, $name, $type, $values, $sub) = @_; |
269 | if (my $quoted = quoted_from_sub($sub)) { |
625d6219 |
270 | my $code = $quoted->[1]; |
e57f338d |
271 | my $at_ = '@_ = ('.$values.');'; |
8c6626cf |
272 | if (my $captures = $quoted->[2]) { |
6d377074 |
273 | my $cap_name = qq{\$${type}_captures_for_${name}}; |
8c6626cf |
274 | $self->{captures}->{$cap_name} = \$captures; |
e57f338d |
275 | Sub::Quote::inlinify( |
276 | $code, $values, Sub::Quote::capture_unroll($cap_name, $captures, 6) |
277 | ); |
278 | } else { |
279 | Sub::Quote::inlinify($code, $values); |
8c6626cf |
280 | } |
901efe1a |
281 | } else { |
282 | my $cap_name = qq{\$${type}_for_${name}}; |
283 | $self->{captures}->{$cap_name} = \$sub; |
284 | "${cap_name}->(${values})"; |
625d6219 |
285 | } |
a16d301e |
286 | } |
287 | |
3a9a65a4 |
288 | sub generate_populate_set { |
289 | my $self = shift; |
e57f338d |
290 | $self->{captures} = {}; |
3a9a65a4 |
291 | my $code = $self->_generate_populate_set(@_); |
e57f338d |
292 | ($code, delete $self->{captures}); |
3a9a65a4 |
293 | } |
294 | |
295 | sub _generate_populate_set { |
296 | my ($self, $me, $name, $spec, $source, $test) = @_; |
4ced3a94 |
297 | if ($self->has_eager_default($name, $spec)) { |
3a9a65a4 |
298 | my $get_indent = ' ' x ($spec->{isa} ? 6 : 4); |
d02da2bc |
299 | my $get_default = $self->_generate_get_default( |
300 | '$new', $_, $spec |
301 | ); |
3a9a65a4 |
302 | my $get_value = |
d02da2bc |
303 | defined($spec->{init_arg}) |
304 | ? "(\n${get_indent} ${test}\n${get_indent} ? ${source}\n${get_indent} : " |
305 | .$get_default |
306 | ."\n${get_indent})" |
307 | : $get_default; |
7fe3b886 |
308 | if ( $spec->{coerce} ) { |
309 | $get_value = $self->_generate_coerce( |
310 | $name, $me, $get_value, |
311 | $spec->{coerce} |
312 | ) |
313 | } |
3a9a65a4 |
314 | ($spec->{isa} |
315 | ? " {\n my \$value = ".$get_value.";\n " |
5d349892 |
316 | .$self->_generate_isa_check( |
317 | $name, '$value', $spec->{isa} |
318 | ).";\n" |
32381de9 |
319 | .' '.$self->_generate_simple_set($me, $name, $spec, '$value').";\n" |
5d349892 |
320 | ." }\n" |
32381de9 |
321 | : ' '.$self->_generate_simple_set($me, $name, $spec, $get_value).";\n" |
3a9a65a4 |
322 | ) |
323 | .($spec->{trigger} |
324 | ? ' ' |
5d349892 |
325 | .$self->_generate_trigger( |
326 | $name, $me, $self->_generate_simple_get($me, $name), |
327 | $spec->{trigger} |
328 | )." if ${test};\n" |
3a9a65a4 |
329 | : '' |
330 | ); |
331 | } else { |
332 | " if (${test}) {\n" |
82a5b146 |
333 | .($spec->{coerce} |
334 | ? " $source = " |
335 | .$self->_generate_coerce( |
336 | $name, $me, $source, |
337 | $spec->{coerce} |
338 | ).";\n" |
339 | : "" |
340 | ) |
3a9a65a4 |
341 | .($spec->{isa} |
342 | ? " " |
5d349892 |
343 | .$self->_generate_isa_check( |
344 | $name, $source, $spec->{isa} |
345 | ).";\n" |
3a9a65a4 |
346 | : "" |
347 | ) |
32381de9 |
348 | ." ".$self->_generate_simple_set($me, $name, $spec, $source).";\n" |
3a9a65a4 |
349 | .($spec->{trigger} |
5d349892 |
350 | ? " " |
351 | .$self->_generate_trigger( |
352 | $name, $me, $self->_generate_simple_get($me, $name), |
353 | $spec->{trigger} |
354 | ).";\n" |
355 | : "" |
3a9a65a4 |
356 | ) |
357 | ." }\n"; |
358 | } |
359 | } |
360 | |
361 | sub generate_multi_set { |
362 | my ($self, $me, $to_set, $from) = @_; |
363 | "\@{${me}}{qw(${\join ' ', @$to_set})} = $from"; |
364 | } |
365 | |
a16d301e |
366 | sub _generate_simple_set { |
32381de9 |
367 | my ($self, $me, $name, $spec, $value) = @_; |
a16d301e |
368 | my $name_str = perlstring $name; |
32381de9 |
369 | my $simple = "${me}->{${name_str}} = ${value}"; |
2215d4b9 |
370 | |
32381de9 |
371 | if ($spec->{weak_ref}) { |
372 | require Scalar::Util; |
2215d4b9 |
373 | |
374 | # Perl < 5.8.3 can't weaken refs to readonly vars |
375 | # (e.g. string constants). This *can* be solved by: |
376 | # |
377 | #Internals::SetReadWrite($foo); |
378 | #Scalar::Util::weaken ($foo); |
379 | #Internals::SetReadOnly($foo); |
380 | # |
381 | # but requires XS and is just too damn crazy |
382 | # so simply throw a better exception |
383 | Moo::_Utils::lt_5_8_3() ? <<"EOC" : "Scalar::Util::weaken(${simple})"; |
384 | |
385 | eval { Scalar::Util::weaken($simple); 1 } or do { |
386 | if( \$@ =~ /Modification of a read-only value attempted/) { |
387 | require Carp; |
388 | Carp::croak( sprintf ( |
389 | 'Reference to readonly value in "%s" can not be weakened on Perl < 5.8.3', |
390 | $name_str, |
391 | ) ); |
392 | } else { |
393 | die \$@; |
394 | } |
395 | }; |
396 | EOC |
32381de9 |
397 | } else { |
398 | $simple; |
399 | } |
51a3b106 |
400 | } |
401 | |
402 | sub _generate_getset { |
a16d301e |
403 | my ($self, $name, $spec) = @_; |
dcae37d3 |
404 | q{(@_ > 1}."\n ? ".$self->_generate_set($name, $spec) |
f537c364 |
405 | ."\n : ".$self->_generate_get($name, $spec)."\n )"; |
51a3b106 |
406 | } |
407 | |
4db3a740 |
408 | sub _generate_delegation { |
409 | my ($self, $asserter, $target, $args) = @_; |
410 | my $arg_string = do { |
411 | if (@$args) { |
412 | # I could, I reckon, linearise out non-refs here using perlstring |
413 | # plus something to check for numbers but I'm unsure if it's worth it |
414 | $self->{captures}{'@curries'} = $args; |
415 | '@curries, @_'; |
416 | } else { |
417 | '@_'; |
418 | } |
419 | }; |
420 | "shift->${asserter}->${target}(${arg_string});"; |
421 | } |
422 | |
daa05b62 |
423 | sub _generate_xs { |
dcae37d3 |
424 | my ($self, $type, $into, $name, $slot) = @_; |
daa05b62 |
425 | Class::XSAccessor->import( |
e6f2e914 |
426 | class => $into, |
dcae37d3 |
427 | $type => { $name => $slot } |
daa05b62 |
428 | ); |
901efe1a |
429 | $into->can($name); |
daa05b62 |
430 | } |
431 | |
51a3b106 |
432 | 1; |