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