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'; |
3202e039 |
8 | use Scalar::Util 'blessed'; |
ac34668b |
9 | use overload (); |
baa7d706 |
10 | use Module::Runtime qw(use_module); |
daa05b62 |
11 | BEGIN { |
6e294299 |
12 | our $CAN_HAZ_XS = |
33d35735 |
13 | !$ENV{MOO_XS_DISABLE} |
14 | && |
6e294299 |
15 | _maybe_load_module('Class::XSAccessor') |
16 | && |
edb9977c |
17 | (eval { Class::XSAccessor->VERSION('1.07') }) |
6e294299 |
18 | ; |
daa05b62 |
19 | } |
51a3b106 |
20 | |
866d22cd |
21 | sub _die_overwrite |
bf4aa1ad |
22 | { |
23 | my ($pkg, $method, $type) = @_; |
866d22cd |
24 | die "You cannot overwrite a locally defined method ($method) with @{[ $type || 'an accessor' ]}"; |
bf4aa1ad |
25 | } |
26 | |
316917c9 |
27 | sub generate_method { |
6f68f022 |
28 | my ($self, $into, $name, $spec, $quote_opts) = @_; |
866d22cd |
29 | $spec->{allow_overwrite}++ if $name =~ s/^\+//; |
51a3b106 |
30 | die "Must have an is" unless my $is = $spec->{is}; |
dcae37d3 |
31 | if ($is eq 'ro') { |
32 | $spec->{reader} = $name unless exists $spec->{reader}; |
33 | } elsif ($is eq 'rw') { |
b1a9585f |
34 | $spec->{accessor} = $name unless exists $spec->{accessor} |
35 | or ( $spec->{reader} and $spec->{writer} ); |
dcae37d3 |
36 | } elsif ($is eq 'lazy') { |
dcae37d3 |
37 | $spec->{reader} = $name unless exists $spec->{reader}; |
38 | $spec->{lazy} = 1; |
39 | $spec->{builder} ||= '_build_'.$name unless $spec->{default}; |
2bb6aaa3 |
40 | } elsif ($is eq 'rwp') { |
41 | $spec->{reader} = $name unless exists $spec->{reader}; |
42 | $spec->{writer} = "_set_${name}" unless exists $spec->{writer}; |
dcae37d3 |
43 | } elsif ($is ne 'bare') { |
44 | die "Unknown is ${is}"; |
45 | } |
4752c97b |
46 | if (exists $spec->{builder}) { |
47 | if(ref $spec->{builder}) { |
48 | die "Invalid builder for $into->$name - not a method name, coderef or" |
49 | . " code-convertible object" |
50 | unless ref $spec->{builder} eq 'CODE' |
51 | or (blessed($spec->{builder}) and eval { \&{$spec->{builder}} }); |
52 | $spec->{builder_sub} = $spec->{builder}; |
53 | $spec->{builder} = 1; |
54 | } |
55 | $spec->{builder} = '_build_'.$name if ($spec->{builder}||0) eq 1; |
56 | die "Invalid builder for $into->$name - not a valid method name" |
57 | if $spec->{builder} !~ /\A[A-Za-z_][A-Za-z0-9_]*(?:::[A-Za-z_][A-Za-z0-9_]*)*\z/; |
58 | } |
2bb6aaa3 |
59 | if (($spec->{predicate}||0) eq 1) { |
60 | $spec->{predicate} = $name =~ /^_/ ? "_has${name}" : "has_${name}"; |
61 | } |
62 | if (($spec->{clearer}||0) eq 1) { |
63 | $spec->{clearer} = $name =~ /^_/ ? "_clear${name}" : "clear_${name}"; |
64 | } |
65 | if (($spec->{trigger}||0) eq 1) { |
66 | $spec->{trigger} = quote_sub('shift->_trigger_'.$name.'(@_)'); |
67 | } |
17c4135a |
68 | |
2a894d0c |
69 | if (exists $spec->{coerce}) { |
70 | my $value = $spec->{coerce}; |
71 | my $invalid = "Invalid coerce '" . overload::StrVal($value) |
3202e039 |
72 | . "' for $into->$name - not a coderef"; |
73 | die "$invalid or code-convertible object" |
17c4135a |
74 | unless ref $value and (ref $value eq 'CODE' or blessed($value)); |
3202e039 |
75 | die "$invalid and could not be converted to a coderef: $@" |
17c4135a |
76 | if !eval { \&$value }; |
533797e1 |
77 | } |
78 | |
2a894d0c |
79 | if (exists $spec->{default}) { |
80 | my $value = $spec->{default}; |
81 | if (!defined $value || ref $value) { |
82 | my $invalid = "Invalid default '" . overload::StrVal($value) |
83 | . "' for $into->$name - not a coderef or non-ref"; |
84 | die "$invalid or code-convertible object" |
85 | unless ref $value and (ref $value eq 'CODE' or blessed($value)); |
86 | die "$invalid and could not be converted to a coderef: $@" |
87 | if !eval { \&$value }; |
88 | } |
89 | } |
90 | |
91 | |
dcae37d3 |
92 | my %methods; |
93 | if (my $reader = $spec->{reader}) { |
866d22cd |
94 | _die_overwrite($into, $reader, 'a reader') |
95 | if !$spec->{allow_overwrite} && *{_getglob("${into}::${reader}")}{CODE}; |
dcae37d3 |
96 | if (our $CAN_HAZ_XS && $self->is_simple_get($name, $spec)) { |
97 | $methods{$reader} = $self->_generate_xs( |
873df570 |
98 | getters => $into, $reader, $name, $spec |
dcae37d3 |
99 | ); |
100 | } else { |
e57f338d |
101 | $self->{captures} = {}; |
dcae37d3 |
102 | $methods{$reader} = |
103 | quote_sub "${into}::${reader}" |
33d35735 |
104 | => ' die "'.$reader.' is a read-only accessor" if @_ > 1;'."\n" |
105 | .$self->_generate_get($name, $spec) |
e57f338d |
106 | => delete $self->{captures} |
dcae37d3 |
107 | ; |
108 | } |
109 | } |
110 | if (my $accessor = $spec->{accessor}) { |
866d22cd |
111 | _die_overwrite($into, $accessor, 'an accessor') |
112 | if !$spec->{allow_overwrite} && *{_getglob("${into}::${accessor}")}{CODE}; |
dcae37d3 |
113 | if ( |
114 | our $CAN_HAZ_XS |
115 | && $self->is_simple_get($name, $spec) |
116 | && $self->is_simple_set($name, $spec) |
117 | ) { |
118 | $methods{$accessor} = $self->_generate_xs( |
873df570 |
119 | accessors => $into, $accessor, $name, $spec |
dcae37d3 |
120 | ); |
121 | } else { |
e57f338d |
122 | $self->{captures} = {}; |
dcae37d3 |
123 | $methods{$accessor} = |
124 | quote_sub "${into}::${accessor}" |
125 | => $self->_generate_getset($name, $spec) |
e57f338d |
126 | => delete $self->{captures} |
dcae37d3 |
127 | ; |
128 | } |
129 | } |
130 | if (my $writer = $spec->{writer}) { |
866d22cd |
131 | _die_overwrite($into, $writer, 'a writer') |
132 | if !$spec->{allow_overwrite} && *{_getglob("${into}::${writer}")}{CODE}; |
dcae37d3 |
133 | if ( |
134 | our $CAN_HAZ_XS |
135 | && $self->is_simple_set($name, $spec) |
136 | ) { |
137 | $methods{$writer} = $self->_generate_xs( |
873df570 |
138 | setters => $into, $writer, $name, $spec |
dcae37d3 |
139 | ); |
51a3b106 |
140 | } else { |
e57f338d |
141 | $self->{captures} = {}; |
dcae37d3 |
142 | $methods{$writer} = |
143 | quote_sub "${into}::${writer}" |
144 | => $self->_generate_set($name, $spec) |
e57f338d |
145 | => delete $self->{captures} |
dcae37d3 |
146 | ; |
51a3b106 |
147 | } |
dcae37d3 |
148 | } |
8f333548 |
149 | if (my $pred = $spec->{predicate}) { |
866d22cd |
150 | _die_overwrite($into, $pred, 'a predicate') |
151 | if !$spec->{allow_overwrite} && *{_getglob("${into}::${pred}")}{CODE}; |
dcae37d3 |
152 | $methods{$pred} = |
153 | quote_sub "${into}::${pred}" => |
ceea0e38 |
154 | ' '.$self->_generate_simple_has('$_[0]', $name, $spec)."\n" |
dcae37d3 |
155 | ; |
8f333548 |
156 | } |
4752c97b |
157 | if (my $pred = $spec->{builder_sub}) { |
158 | _install_coderef( "${into}::$spec->{builder}" => $spec->{builder_sub} ); |
159 | } |
8f333548 |
160 | if (my $cl = $spec->{clearer}) { |
866d22cd |
161 | _die_overwrite($into, $cl, 'a clearer') |
162 | if !$spec->{allow_overwrite} && *{_getglob("${into}::${cl}")}{CODE}; |
dcae37d3 |
163 | $methods{$cl} = |
164 | quote_sub "${into}::${cl}" => |
ceea0e38 |
165 | $self->_generate_simple_clear('$_[0]', $name, $spec)."\n" |
dcae37d3 |
166 | ; |
901efe1a |
167 | } |
4db3a740 |
168 | if (my $hspec = $spec->{handles}) { |
169 | my $asserter = $spec->{asserter} ||= '_assert_'.$name; |
170 | my @specs = do { |
171 | if (ref($hspec) eq 'ARRAY') { |
172 | map [ $_ => $_ ], @$hspec; |
173 | } elsif (ref($hspec) eq 'HASH') { |
174 | map [ $_ => ref($hspec->{$_}) ? @{$hspec->{$_}} : $hspec->{$_} ], |
175 | keys %$hspec; |
176 | } elsif (!ref($hspec)) { |
baa7d706 |
177 | map [ $_ => $_ ], use_module('Role::Tiny')->methods_provided_by(use_module($hspec)) |
4db3a740 |
178 | } else { |
179 | die "You gave me a handles of ${hspec} and I have no idea why"; |
180 | } |
181 | }; |
f73677cc |
182 | foreach my $delegation_spec (@specs) { |
183 | my ($proxy, $target, @args) = @$delegation_spec; |
866d22cd |
184 | _die_overwrite($into, $proxy, 'a delegation') |
185 | if !$spec->{allow_overwrite} && *{_getglob("${into}::${proxy}")}{CODE}; |
e57f338d |
186 | $self->{captures} = {}; |
4db3a740 |
187 | $methods{$proxy} = |
188 | quote_sub "${into}::${proxy}" => |
189 | $self->_generate_delegation($asserter, $target, \@args), |
e57f338d |
190 | delete $self->{captures} |
4db3a740 |
191 | ; |
192 | } |
193 | } |
194 | if (my $asserter = $spec->{asserter}) { |
e57f338d |
195 | $self->{captures} = {}; |
43a43bff |
196 | |
43a43bff |
197 | |
4db3a740 |
198 | $methods{$asserter} = |
6d92e9d8 |
199 | quote_sub "${into}::${asserter}" => $self->_generate_asserter($name, $spec), |
e57f338d |
200 | delete $self->{captures} |
4db3a740 |
201 | ; |
202 | } |
dcae37d3 |
203 | \%methods; |
51a3b106 |
204 | } |
205 | |
3a9a65a4 |
206 | sub is_simple_attribute { |
207 | my ($self, $name, $spec) = @_; |
8f333548 |
208 | # clearer doesn't have to be listed because it doesn't |
209 | # affect whether defined/exists makes a difference |
901efe1a |
210 | !grep $spec->{$_}, |
82a5b146 |
211 | qw(lazy default builder coerce isa trigger predicate weak_ref); |
3a9a65a4 |
212 | } |
213 | |
daa05b62 |
214 | sub is_simple_get { |
215 | my ($self, $name, $spec) = @_; |
901efe1a |
216 | !($spec->{lazy} and ($spec->{default} or $spec->{builder})); |
daa05b62 |
217 | } |
218 | |
219 | sub is_simple_set { |
220 | my ($self, $name, $spec) = @_; |
82a5b146 |
221 | !grep $spec->{$_}, qw(coerce isa trigger weak_ref); |
daa05b62 |
222 | } |
223 | |
4ced3a94 |
224 | sub has_eager_default { |
225 | my ($self, $name, $spec) = @_; |
226 | (!$spec->{lazy} and ($spec->{default} or $spec->{builder})); |
227 | } |
228 | |
51a3b106 |
229 | sub _generate_get { |
46389f86 |
230 | my ($self, $name, $spec) = @_; |
ceea0e38 |
231 | my $simple = $self->_generate_simple_get('$_[0]', $name, $spec); |
901efe1a |
232 | if ($self->is_simple_get($name, $spec)) { |
233 | $simple; |
234 | } else { |
235 | 'do { '.$self->_generate_use_default( |
236 | '$_[0]', $name, $spec, |
ceea0e38 |
237 | $self->_generate_simple_has('$_[0]', $name, $spec), |
ef21bc32 |
238 | ).'; ' |
239 | .($spec->{isa} |
240 | ?($self->_generate_isa_check($name, $simple, $spec->{isa}).'; ') |
241 | :'' |
242 | ) |
243 | .$simple.' }'; |
901efe1a |
244 | } |
46389f86 |
245 | } |
246 | |
247 | sub _generate_simple_has { |
248 | my ($self, $me, $name) = @_; |
249 | "exists ${me}->{${\perlstring $name}}"; |
250 | } |
251 | |
02e9ef74 |
252 | sub _generate_simple_clear { |
253 | my ($self, $me, $name) = @_; |
254 | " delete ${me}->{${\perlstring $name}}\n" |
255 | } |
256 | |
649ac264 |
257 | sub generate_get_default { |
258 | my $self = shift; |
e57f338d |
259 | $self->{captures} = {}; |
649ac264 |
260 | my $code = $self->_generate_get_default(@_); |
e57f338d |
261 | ($code, delete $self->{captures}); |
649ac264 |
262 | } |
263 | |
264 | sub _generate_use_default { |
265 | my ($self, $me, $name, $spec, $test) = @_; |
160c2c2c |
266 | my $get_value = $self->_generate_get_default($me, $name, $spec); |
267 | if ($spec->{coerce}) { |
268 | $get_value = $self->_generate_coerce( |
b1f04da5 |
269 | $name, $get_value, |
160c2c2c |
270 | $spec->{coerce} |
271 | ) |
272 | } |
46389f86 |
273 | $self->_generate_simple_set( |
160c2c2c |
274 | $me, $name, $spec, $get_value |
46389f86 |
275 | ).' unless '.$test; |
a16d301e |
276 | } |
277 | |
649ac264 |
278 | sub _generate_get_default { |
279 | my ($self, $me, $name, $spec) = @_; |
2a894d0c |
280 | if (exists $spec->{default}) { |
281 | ref $spec->{default} |
282 | ? $self->_generate_call_code($name, 'default', $me, $spec->{default}) |
283 | : perlstring $spec->{default}; |
284 | } |
285 | else { |
286 | "${me}->${\$spec->{builder}}" |
287 | } |
649ac264 |
288 | } |
289 | |
a16d301e |
290 | sub generate_simple_get { |
901efe1a |
291 | my ($self, @args) = @_; |
292 | $self->_generate_simple_get(@args); |
a16d301e |
293 | } |
294 | |
295 | sub _generate_simple_get { |
296 | my ($self, $me, $name) = @_; |
297 | my $name_str = perlstring $name; |
298 | "${me}->{${name_str}}"; |
51a3b106 |
299 | } |
300 | |
301 | sub _generate_set { |
dcae37d3 |
302 | my ($self, $name, $spec) = @_; |
901efe1a |
303 | if ($self->is_simple_set($name, $spec)) { |
32381de9 |
304 | $self->_generate_simple_set('$_[0]', $name, $spec, '$_[1]'); |
6d377074 |
305 | } else { |
82a5b146 |
306 | my ($coerce, $trigger, $isa_check) = @{$spec}{qw(coerce trigger isa)}; |
32381de9 |
307 | my $simple = $self->_generate_simple_set('$self', $name, $spec, '$value'); |
e57f338d |
308 | my $code = "do { my (\$self, \$value) = \@_;\n"; |
82a5b146 |
309 | if ($coerce) { |
310 | $code .= |
311 | " \$value = " |
b1f04da5 |
312 | .$self->_generate_coerce($name, '$value', $coerce).";\n"; |
82a5b146 |
313 | } |
901efe1a |
314 | if ($isa_check) { |
315 | $code .= |
e57f338d |
316 | " ".$self->_generate_isa_check($name, '$value', $isa_check).";\n"; |
901efe1a |
317 | } |
318 | if ($trigger) { |
e57f338d |
319 | my $fire = $self->_generate_trigger($name, '$self', '$value', $trigger); |
901efe1a |
320 | $code .= |
e57f338d |
321 | " ".$simple.";\n ".$fire.";\n" |
901efe1a |
322 | ." \$value;\n"; |
323 | } else { |
324 | $code .= " ".$simple.";\n"; |
325 | } |
326 | $code .= " }"; |
327 | $code; |
a16d301e |
328 | } |
a16d301e |
329 | } |
82a5b146 |
330 | |
331 | sub generate_coerce { |
332 | my $self = shift; |
333 | $self->{captures} = {}; |
334 | my $code = $self->_generate_coerce(@_); |
335 | ($code, delete $self->{captures}); |
336 | } |
337 | |
234f614d |
338 | sub _attr_desc { |
339 | my ($name, $init_arg) = @_; |
340 | return perlstring($name) if !defined($init_arg) or $init_arg eq $name; |
341 | return perlstring($name).' (constructor argument: '.perlstring($init_arg).')'; |
342 | } |
343 | |
82a5b146 |
344 | sub _generate_coerce { |
234f614d |
345 | my ($self, $name, $value, $coerce, $init_arg) = @_; |
2d592c35 |
346 | $self->_generate_die_prefix( |
234f614d |
347 | "coercion for ${\_attr_desc($name, $init_arg)} failed: ", |
2d592c35 |
348 | $self->_generate_call_code($name, 'coerce', "${value}", $coerce) |
349 | ); |
82a5b146 |
350 | } |
351 | |
a16d301e |
352 | sub generate_trigger { |
353 | my $self = shift; |
e57f338d |
354 | $self->{captures} = {}; |
a16d301e |
355 | my $code = $self->_generate_trigger(@_); |
e57f338d |
356 | ($code, delete $self->{captures}); |
a16d301e |
357 | } |
358 | |
359 | sub _generate_trigger { |
360 | my ($self, $name, $obj, $value, $trigger) = @_; |
6d377074 |
361 | $self->_generate_call_code($name, 'trigger', "${obj}, ${value}", $trigger); |
362 | } |
363 | |
364 | sub generate_isa_check { |
901efe1a |
365 | my ($self, @args) = @_; |
e57f338d |
366 | $self->{captures} = {}; |
901efe1a |
367 | my $code = $self->_generate_isa_check(@args); |
e57f338d |
368 | ($code, delete $self->{captures}); |
6d377074 |
369 | } |
370 | |
2d592c35 |
371 | sub _generate_die_prefix { |
372 | my ($self, $prefix, $inside) = @_; |
373 | "do {\n" |
bc65d744 |
374 | .' my $sig_die = $SIG{__DIE__} || sub { die $_[0] };'."\n" |
375 | .' local $SIG{__DIE__} = sub {'."\n" |
2d592c35 |
376 | .' $sig_die->(ref($_[0]) ? $_[0] : '.perlstring($prefix).'.$_[0]);'."\n" |
bc65d744 |
377 | .' };'."\n" |
2d592c35 |
378 | .$inside |
bc65d744 |
379 | ."}\n" |
6d377074 |
380 | } |
381 | |
2d592c35 |
382 | sub _generate_isa_check { |
234f614d |
383 | my ($self, $name, $value, $check, $init_arg) = @_; |
2d592c35 |
384 | $self->_generate_die_prefix( |
234f614d |
385 | "isa check for ${\_attr_desc($name, $init_arg)} failed: ", |
2d592c35 |
386 | $self->_generate_call_code($name, 'isa_check', $value, $check) |
387 | ); |
388 | } |
389 | |
6d377074 |
390 | sub _generate_call_code { |
391 | my ($self, $name, $type, $values, $sub) = @_; |
2f425b57 |
392 | $sub = \&{$sub} if blessed($sub); # coderef if blessed |
6d377074 |
393 | if (my $quoted = quoted_from_sub($sub)) { |
625d6219 |
394 | my $code = $quoted->[1]; |
8c6626cf |
395 | if (my $captures = $quoted->[2]) { |
6d377074 |
396 | my $cap_name = qq{\$${type}_captures_for_${name}}; |
8c6626cf |
397 | $self->{captures}->{$cap_name} = \$captures; |
e57f338d |
398 | Sub::Quote::inlinify( |
159d9c5b |
399 | $code, $values, Sub::Quote::capture_unroll($cap_name, $captures, 6), 1 |
e57f338d |
400 | ); |
401 | } else { |
159d9c5b |
402 | Sub::Quote::inlinify($code, $values, undef, 1); |
8c6626cf |
403 | } |
901efe1a |
404 | } else { |
405 | my $cap_name = qq{\$${type}_for_${name}}; |
406 | $self->{captures}->{$cap_name} = \$sub; |
407 | "${cap_name}->(${values})"; |
625d6219 |
408 | } |
a16d301e |
409 | } |
410 | |
3a9a65a4 |
411 | sub generate_populate_set { |
412 | my $self = shift; |
e57f338d |
413 | $self->{captures} = {}; |
3a9a65a4 |
414 | my $code = $self->_generate_populate_set(@_); |
e57f338d |
415 | ($code, delete $self->{captures}); |
3a9a65a4 |
416 | } |
417 | |
418 | sub _generate_populate_set { |
234f614d |
419 | my ($self, $me, $name, $spec, $source, $test, $init_arg) = @_; |
4ced3a94 |
420 | if ($self->has_eager_default($name, $spec)) { |
3a9a65a4 |
421 | my $get_indent = ' ' x ($spec->{isa} ? 6 : 4); |
d02da2bc |
422 | my $get_default = $self->_generate_get_default( |
423 | '$new', $_, $spec |
424 | ); |
3a9a65a4 |
425 | my $get_value = |
d02da2bc |
426 | defined($spec->{init_arg}) |
427 | ? "(\n${get_indent} ${test}\n${get_indent} ? ${source}\n${get_indent} : " |
428 | .$get_default |
429 | ."\n${get_indent})" |
430 | : $get_default; |
b1f04da5 |
431 | if ($spec->{coerce}) { |
432 | $get_value = $self->_generate_coerce( |
433 | $name, $get_value, |
234f614d |
434 | $spec->{coerce}, $init_arg |
b1f04da5 |
435 | ) |
7fe3b886 |
436 | } |
3a9a65a4 |
437 | ($spec->{isa} |
438 | ? " {\n my \$value = ".$get_value.";\n " |
5d349892 |
439 | .$self->_generate_isa_check( |
234f614d |
440 | $name, '$value', $spec->{isa}, $init_arg |
5d349892 |
441 | ).";\n" |
32381de9 |
442 | .' '.$self->_generate_simple_set($me, $name, $spec, '$value').";\n" |
5d349892 |
443 | ." }\n" |
32381de9 |
444 | : ' '.$self->_generate_simple_set($me, $name, $spec, $get_value).";\n" |
3a9a65a4 |
445 | ) |
446 | .($spec->{trigger} |
447 | ? ' ' |
5d349892 |
448 | .$self->_generate_trigger( |
ceea0e38 |
449 | $name, $me, $self->_generate_simple_get($me, $name, $spec), |
5d349892 |
450 | $spec->{trigger} |
451 | )." if ${test};\n" |
3a9a65a4 |
452 | : '' |
453 | ); |
454 | } else { |
455 | " if (${test}) {\n" |
82a5b146 |
456 | .($spec->{coerce} |
457 | ? " $source = " |
458 | .$self->_generate_coerce( |
b1f04da5 |
459 | $name, $source, |
234f614d |
460 | $spec->{coerce}, $init_arg |
82a5b146 |
461 | ).";\n" |
462 | : "" |
463 | ) |
3a9a65a4 |
464 | .($spec->{isa} |
465 | ? " " |
5d349892 |
466 | .$self->_generate_isa_check( |
234f614d |
467 | $name, $source, $spec->{isa}, $init_arg |
5d349892 |
468 | ).";\n" |
3a9a65a4 |
469 | : "" |
470 | ) |
32381de9 |
471 | ." ".$self->_generate_simple_set($me, $name, $spec, $source).";\n" |
3a9a65a4 |
472 | .($spec->{trigger} |
5d349892 |
473 | ? " " |
474 | .$self->_generate_trigger( |
ceea0e38 |
475 | $name, $me, $self->_generate_simple_get($me, $name, $spec), |
5d349892 |
476 | $spec->{trigger} |
477 | ).";\n" |
478 | : "" |
3a9a65a4 |
479 | ) |
480 | ." }\n"; |
481 | } |
482 | } |
483 | |
873df570 |
484 | sub _generate_core_set { |
485 | my ($self, $me, $name, $spec, $value) = @_; |
486 | my $name_str = perlstring $name; |
487 | "${me}->{${name_str}} = ${value}"; |
488 | } |
489 | |
a16d301e |
490 | sub _generate_simple_set { |
32381de9 |
491 | my ($self, $me, $name, $spec, $value) = @_; |
a16d301e |
492 | my $name_str = perlstring $name; |
2215d4b9 |
493 | |
32381de9 |
494 | if ($spec->{weak_ref}) { |
6998abed |
495 | $value = '$preserve = '.$value; |
496 | my $simple = $self->_generate_core_set($me, $name, $spec, $value); |
faa9ce11 |
497 | require Scalar::Util; |
2215d4b9 |
498 | |
499 | # Perl < 5.8.3 can't weaken refs to readonly vars |
500 | # (e.g. string constants). This *can* be solved by: |
501 | # |
502 | #Internals::SetReadWrite($foo); |
503 | #Scalar::Util::weaken ($foo); |
504 | #Internals::SetReadOnly($foo); |
505 | # |
506 | # but requires XS and is just too damn crazy |
507 | # so simply throw a better exception |
f3dc0ac6 |
508 | my $weak_simple = "my \$preserve; Scalar::Util::weaken(${simple}); no warnings 'void'; \$preserve"; |
6998abed |
509 | Moo::_Utils::lt_5_8_3() ? <<"EOC" : $weak_simple; |
2215d4b9 |
510 | |
6998abed |
511 | my \$preserve; |
42ae0e0c |
512 | eval { Scalar::Util::weaken($simple); 1 } |
513 | ? do { no warnings 'void'; \$preserve; } |
514 | : do { |
515 | if( \$@ =~ /Modification of a read-only value attempted/) { |
516 | require Carp; |
517 | Carp::croak( sprintf ( |
518 | 'Reference to readonly value in "%s" can not be weakened on Perl < 5.8.3', |
519 | $name_str, |
520 | ) ); |
521 | } else { |
522 | die \$@; |
523 | } |
2215d4b9 |
524 | } |
2215d4b9 |
525 | EOC |
32381de9 |
526 | } else { |
6998abed |
527 | $self->_generate_core_set($me, $name, $spec, $value); |
32381de9 |
528 | } |
51a3b106 |
529 | } |
530 | |
531 | sub _generate_getset { |
a16d301e |
532 | my ($self, $name, $spec) = @_; |
dcae37d3 |
533 | q{(@_ > 1}."\n ? ".$self->_generate_set($name, $spec) |
f537c364 |
534 | ."\n : ".$self->_generate_get($name, $spec)."\n )"; |
51a3b106 |
535 | } |
536 | |
6d92e9d8 |
537 | sub _generate_asserter { |
538 | my ($self, $name, $spec) = @_; |
539 | |
540 | "do {\n" |
541 | ." my \$val = ".$self->_generate_get($name, $spec).";\n" |
3e2a2918 |
542 | ." unless (".$self->_generate_simple_has('$_[0]', $name, $spec).") {\n" |
6d92e9d8 |
543 | .qq! die "Attempted to access '${name}' but it is not set";\n! |
544 | ." }\n" |
545 | ." \$val;\n" |
546 | ."}\n"; |
547 | } |
4db3a740 |
548 | sub _generate_delegation { |
549 | my ($self, $asserter, $target, $args) = @_; |
550 | my $arg_string = do { |
551 | if (@$args) { |
552 | # I could, I reckon, linearise out non-refs here using perlstring |
553 | # plus something to check for numbers but I'm unsure if it's worth it |
554 | $self->{captures}{'@curries'} = $args; |
555 | '@curries, @_'; |
556 | } else { |
557 | '@_'; |
558 | } |
559 | }; |
560 | "shift->${asserter}->${target}(${arg_string});"; |
561 | } |
562 | |
daa05b62 |
563 | sub _generate_xs { |
dcae37d3 |
564 | my ($self, $type, $into, $name, $slot) = @_; |
daa05b62 |
565 | Class::XSAccessor->import( |
e6f2e914 |
566 | class => $into, |
9f10cfe0 |
567 | $type => { $name => $slot }, |
568 | replace => 1, |
daa05b62 |
569 | ); |
901efe1a |
570 | $into->can($name); |
daa05b62 |
571 | } |
572 | |
02e9ef74 |
573 | sub default_construction_string { '{}' } |
574 | |
51a3b106 |
575 | 1; |