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 | |
316917c9 |
21 | sub generate_method { |
6f68f022 |
22 | my ($self, $into, $name, $spec, $quote_opts) = @_; |
9f10cfe0 |
23 | $name =~ s/^\+//; |
51a3b106 |
24 | die "Must have an is" unless my $is = $spec->{is}; |
dcae37d3 |
25 | if ($is eq 'ro') { |
26 | $spec->{reader} = $name unless exists $spec->{reader}; |
27 | } elsif ($is eq 'rw') { |
b1a9585f |
28 | $spec->{accessor} = $name unless exists $spec->{accessor} |
29 | or ( $spec->{reader} and $spec->{writer} ); |
dcae37d3 |
30 | } elsif ($is eq 'lazy') { |
dcae37d3 |
31 | $spec->{reader} = $name unless exists $spec->{reader}; |
32 | $spec->{lazy} = 1; |
33 | $spec->{builder} ||= '_build_'.$name unless $spec->{default}; |
2bb6aaa3 |
34 | } elsif ($is eq 'rwp') { |
35 | $spec->{reader} = $name unless exists $spec->{reader}; |
36 | $spec->{writer} = "_set_${name}" unless exists $spec->{writer}; |
dcae37d3 |
37 | } elsif ($is ne 'bare') { |
38 | die "Unknown is ${is}"; |
39 | } |
4752c97b |
40 | if (exists $spec->{builder}) { |
41 | if(ref $spec->{builder}) { |
42 | die "Invalid builder for $into->$name - not a method name, coderef or" |
43 | . " code-convertible object" |
44 | unless ref $spec->{builder} eq 'CODE' |
45 | or (blessed($spec->{builder}) and eval { \&{$spec->{builder}} }); |
46 | $spec->{builder_sub} = $spec->{builder}; |
47 | $spec->{builder} = 1; |
48 | } |
49 | $spec->{builder} = '_build_'.$name if ($spec->{builder}||0) eq 1; |
50 | die "Invalid builder for $into->$name - not a valid method name" |
51 | if $spec->{builder} !~ /\A[A-Za-z_][A-Za-z0-9_]*(?:::[A-Za-z_][A-Za-z0-9_]*)*\z/; |
52 | } |
2bb6aaa3 |
53 | if (($spec->{predicate}||0) eq 1) { |
54 | $spec->{predicate} = $name =~ /^_/ ? "_has${name}" : "has_${name}"; |
55 | } |
56 | if (($spec->{clearer}||0) eq 1) { |
57 | $spec->{clearer} = $name =~ /^_/ ? "_clear${name}" : "clear_${name}"; |
58 | } |
59 | if (($spec->{trigger}||0) eq 1) { |
60 | $spec->{trigger} = quote_sub('shift->_trigger_'.$name.'(@_)'); |
61 | } |
17c4135a |
62 | |
2a894d0c |
63 | if (exists $spec->{coerce}) { |
64 | my $value = $spec->{coerce}; |
65 | my $invalid = "Invalid coerce '" . overload::StrVal($value) |
3202e039 |
66 | . "' for $into->$name - not a coderef"; |
67 | die "$invalid or code-convertible object" |
17c4135a |
68 | unless ref $value and (ref $value eq 'CODE' or blessed($value)); |
3202e039 |
69 | die "$invalid and could not be converted to a coderef: $@" |
17c4135a |
70 | if !eval { \&$value }; |
533797e1 |
71 | } |
72 | |
2a894d0c |
73 | if (exists $spec->{default}) { |
74 | my $value = $spec->{default}; |
75 | if (!defined $value || ref $value) { |
76 | my $invalid = "Invalid default '" . overload::StrVal($value) |
77 | . "' for $into->$name - not a coderef or non-ref"; |
78 | die "$invalid or code-convertible object" |
79 | unless ref $value and (ref $value eq 'CODE' or blessed($value)); |
80 | die "$invalid and could not be converted to a coderef: $@" |
81 | if !eval { \&$value }; |
82 | } |
83 | } |
84 | |
85 | |
dcae37d3 |
86 | my %methods; |
87 | if (my $reader = $spec->{reader}) { |
88 | if (our $CAN_HAZ_XS && $self->is_simple_get($name, $spec)) { |
89 | $methods{$reader} = $self->_generate_xs( |
873df570 |
90 | getters => $into, $reader, $name, $spec |
dcae37d3 |
91 | ); |
92 | } else { |
e57f338d |
93 | $self->{captures} = {}; |
dcae37d3 |
94 | $methods{$reader} = |
95 | quote_sub "${into}::${reader}" |
33d35735 |
96 | => ' die "'.$reader.' is a read-only accessor" if @_ > 1;'."\n" |
97 | .$self->_generate_get($name, $spec) |
e57f338d |
98 | => delete $self->{captures} |
dcae37d3 |
99 | ; |
100 | } |
101 | } |
102 | if (my $accessor = $spec->{accessor}) { |
103 | if ( |
104 | our $CAN_HAZ_XS |
105 | && $self->is_simple_get($name, $spec) |
106 | && $self->is_simple_set($name, $spec) |
107 | ) { |
108 | $methods{$accessor} = $self->_generate_xs( |
873df570 |
109 | accessors => $into, $accessor, $name, $spec |
dcae37d3 |
110 | ); |
111 | } else { |
e57f338d |
112 | $self->{captures} = {}; |
dcae37d3 |
113 | $methods{$accessor} = |
114 | quote_sub "${into}::${accessor}" |
115 | => $self->_generate_getset($name, $spec) |
e57f338d |
116 | => delete $self->{captures} |
dcae37d3 |
117 | ; |
118 | } |
119 | } |
120 | if (my $writer = $spec->{writer}) { |
121 | if ( |
122 | our $CAN_HAZ_XS |
123 | && $self->is_simple_set($name, $spec) |
124 | ) { |
125 | $methods{$writer} = $self->_generate_xs( |
873df570 |
126 | setters => $into, $writer, $name, $spec |
dcae37d3 |
127 | ); |
51a3b106 |
128 | } else { |
e57f338d |
129 | $self->{captures} = {}; |
dcae37d3 |
130 | $methods{$writer} = |
131 | quote_sub "${into}::${writer}" |
132 | => $self->_generate_set($name, $spec) |
e57f338d |
133 | => delete $self->{captures} |
dcae37d3 |
134 | ; |
51a3b106 |
135 | } |
dcae37d3 |
136 | } |
8f333548 |
137 | if (my $pred = $spec->{predicate}) { |
dcae37d3 |
138 | $methods{$pred} = |
139 | quote_sub "${into}::${pred}" => |
ceea0e38 |
140 | ' '.$self->_generate_simple_has('$_[0]', $name, $spec)."\n" |
dcae37d3 |
141 | ; |
8f333548 |
142 | } |
4752c97b |
143 | if (my $pred = $spec->{builder_sub}) { |
144 | _install_coderef( "${into}::$spec->{builder}" => $spec->{builder_sub} ); |
145 | } |
8f333548 |
146 | if (my $cl = $spec->{clearer}) { |
dcae37d3 |
147 | $methods{$cl} = |
148 | quote_sub "${into}::${cl}" => |
ceea0e38 |
149 | $self->_generate_simple_clear('$_[0]', $name, $spec)."\n" |
dcae37d3 |
150 | ; |
901efe1a |
151 | } |
4db3a740 |
152 | if (my $hspec = $spec->{handles}) { |
153 | my $asserter = $spec->{asserter} ||= '_assert_'.$name; |
154 | my @specs = do { |
155 | if (ref($hspec) eq 'ARRAY') { |
156 | map [ $_ => $_ ], @$hspec; |
157 | } elsif (ref($hspec) eq 'HASH') { |
158 | map [ $_ => ref($hspec->{$_}) ? @{$hspec->{$_}} : $hspec->{$_} ], |
159 | keys %$hspec; |
160 | } elsif (!ref($hspec)) { |
baa7d706 |
161 | map [ $_ => $_ ], use_module('Role::Tiny')->methods_provided_by(use_module($hspec)) |
4db3a740 |
162 | } else { |
163 | die "You gave me a handles of ${hspec} and I have no idea why"; |
164 | } |
165 | }; |
166 | foreach my $spec (@specs) { |
167 | my ($proxy, $target, @args) = @$spec; |
e57f338d |
168 | $self->{captures} = {}; |
cc3310ee |
169 | if ( *{_getglob("${into}::${proxy}")}{CODE} ) { |
170 | die "You cannot overwrite a locally defined method ($proxy) with a delegation"; |
171 | } |
4db3a740 |
172 | $methods{$proxy} = |
173 | quote_sub "${into}::${proxy}" => |
174 | $self->_generate_delegation($asserter, $target, \@args), |
e57f338d |
175 | delete $self->{captures} |
4db3a740 |
176 | ; |
177 | } |
178 | } |
179 | if (my $asserter = $spec->{asserter}) { |
e57f338d |
180 | $self->{captures} = {}; |
43a43bff |
181 | |
182 | my $code = "do {\n" |
183 | ." my \$val = ".$self->_generate_get($name, $spec).";\n" |
184 | ." unless (".$self->_generate_simple_has('$_[0]', $name).") {\n" |
185 | .qq! die "Attempted to access '${name}' but it is not set";\n! |
186 | ." }\n" |
187 | ." \$val;\n" |
188 | ."}\n"; |
189 | |
4db3a740 |
190 | $methods{$asserter} = |
43a43bff |
191 | quote_sub "${into}::${asserter}" => $code, |
e57f338d |
192 | delete $self->{captures} |
4db3a740 |
193 | ; |
194 | } |
dcae37d3 |
195 | \%methods; |
51a3b106 |
196 | } |
197 | |
3a9a65a4 |
198 | sub is_simple_attribute { |
199 | my ($self, $name, $spec) = @_; |
8f333548 |
200 | # clearer doesn't have to be listed because it doesn't |
201 | # affect whether defined/exists makes a difference |
901efe1a |
202 | !grep $spec->{$_}, |
82a5b146 |
203 | qw(lazy default builder coerce isa trigger predicate weak_ref); |
3a9a65a4 |
204 | } |
205 | |
daa05b62 |
206 | sub is_simple_get { |
207 | my ($self, $name, $spec) = @_; |
901efe1a |
208 | !($spec->{lazy} and ($spec->{default} or $spec->{builder})); |
daa05b62 |
209 | } |
210 | |
211 | sub is_simple_set { |
212 | my ($self, $name, $spec) = @_; |
82a5b146 |
213 | !grep $spec->{$_}, qw(coerce isa trigger weak_ref); |
daa05b62 |
214 | } |
215 | |
4ced3a94 |
216 | sub has_eager_default { |
217 | my ($self, $name, $spec) = @_; |
218 | (!$spec->{lazy} and ($spec->{default} or $spec->{builder})); |
219 | } |
220 | |
51a3b106 |
221 | sub _generate_get { |
46389f86 |
222 | my ($self, $name, $spec) = @_; |
ceea0e38 |
223 | my $simple = $self->_generate_simple_get('$_[0]', $name, $spec); |
901efe1a |
224 | if ($self->is_simple_get($name, $spec)) { |
225 | $simple; |
226 | } else { |
227 | 'do { '.$self->_generate_use_default( |
228 | '$_[0]', $name, $spec, |
ceea0e38 |
229 | $self->_generate_simple_has('$_[0]', $name, $spec), |
ef21bc32 |
230 | ).'; ' |
231 | .($spec->{isa} |
232 | ?($self->_generate_isa_check($name, $simple, $spec->{isa}).'; ') |
233 | :'' |
234 | ) |
235 | .$simple.' }'; |
901efe1a |
236 | } |
46389f86 |
237 | } |
238 | |
239 | sub _generate_simple_has { |
240 | my ($self, $me, $name) = @_; |
241 | "exists ${me}->{${\perlstring $name}}"; |
242 | } |
243 | |
02e9ef74 |
244 | sub _generate_simple_clear { |
245 | my ($self, $me, $name) = @_; |
246 | " delete ${me}->{${\perlstring $name}}\n" |
247 | } |
248 | |
649ac264 |
249 | sub generate_get_default { |
250 | my $self = shift; |
e57f338d |
251 | $self->{captures} = {}; |
649ac264 |
252 | my $code = $self->_generate_get_default(@_); |
e57f338d |
253 | ($code, delete $self->{captures}); |
649ac264 |
254 | } |
255 | |
256 | sub _generate_use_default { |
257 | my ($self, $me, $name, $spec, $test) = @_; |
160c2c2c |
258 | my $get_value = $self->_generate_get_default($me, $name, $spec); |
259 | if ($spec->{coerce}) { |
260 | $get_value = $self->_generate_coerce( |
b1f04da5 |
261 | $name, $get_value, |
160c2c2c |
262 | $spec->{coerce} |
263 | ) |
264 | } |
46389f86 |
265 | $self->_generate_simple_set( |
160c2c2c |
266 | $me, $name, $spec, $get_value |
46389f86 |
267 | ).' unless '.$test; |
a16d301e |
268 | } |
269 | |
649ac264 |
270 | sub _generate_get_default { |
271 | my ($self, $me, $name, $spec) = @_; |
2a894d0c |
272 | if (exists $spec->{default}) { |
273 | ref $spec->{default} |
274 | ? $self->_generate_call_code($name, 'default', $me, $spec->{default}) |
275 | : perlstring $spec->{default}; |
276 | } |
277 | else { |
278 | "${me}->${\$spec->{builder}}" |
279 | } |
649ac264 |
280 | } |
281 | |
a16d301e |
282 | sub generate_simple_get { |
901efe1a |
283 | my ($self, @args) = @_; |
284 | $self->_generate_simple_get(@args); |
a16d301e |
285 | } |
286 | |
287 | sub _generate_simple_get { |
288 | my ($self, $me, $name) = @_; |
289 | my $name_str = perlstring $name; |
290 | "${me}->{${name_str}}"; |
51a3b106 |
291 | } |
292 | |
293 | sub _generate_set { |
dcae37d3 |
294 | my ($self, $name, $spec) = @_; |
901efe1a |
295 | if ($self->is_simple_set($name, $spec)) { |
32381de9 |
296 | $self->_generate_simple_set('$_[0]', $name, $spec, '$_[1]'); |
6d377074 |
297 | } else { |
82a5b146 |
298 | my ($coerce, $trigger, $isa_check) = @{$spec}{qw(coerce trigger isa)}; |
32381de9 |
299 | my $simple = $self->_generate_simple_set('$self', $name, $spec, '$value'); |
e57f338d |
300 | my $code = "do { my (\$self, \$value) = \@_;\n"; |
82a5b146 |
301 | if ($coerce) { |
302 | $code .= |
303 | " \$value = " |
b1f04da5 |
304 | .$self->_generate_coerce($name, '$value', $coerce).";\n"; |
82a5b146 |
305 | } |
901efe1a |
306 | if ($isa_check) { |
307 | $code .= |
e57f338d |
308 | " ".$self->_generate_isa_check($name, '$value', $isa_check).";\n"; |
901efe1a |
309 | } |
310 | if ($trigger) { |
e57f338d |
311 | my $fire = $self->_generate_trigger($name, '$self', '$value', $trigger); |
901efe1a |
312 | $code .= |
e57f338d |
313 | " ".$simple.";\n ".$fire.";\n" |
901efe1a |
314 | ." \$value;\n"; |
315 | } else { |
316 | $code .= " ".$simple.";\n"; |
317 | } |
318 | $code .= " }"; |
319 | $code; |
a16d301e |
320 | } |
a16d301e |
321 | } |
82a5b146 |
322 | |
323 | sub generate_coerce { |
324 | my $self = shift; |
325 | $self->{captures} = {}; |
326 | my $code = $self->_generate_coerce(@_); |
327 | ($code, delete $self->{captures}); |
328 | } |
329 | |
234f614d |
330 | sub _attr_desc { |
331 | my ($name, $init_arg) = @_; |
332 | return perlstring($name) if !defined($init_arg) or $init_arg eq $name; |
333 | return perlstring($name).' (constructor argument: '.perlstring($init_arg).')'; |
334 | } |
335 | |
82a5b146 |
336 | sub _generate_coerce { |
234f614d |
337 | my ($self, $name, $value, $coerce, $init_arg) = @_; |
2d592c35 |
338 | $self->_generate_die_prefix( |
234f614d |
339 | "coercion for ${\_attr_desc($name, $init_arg)} failed: ", |
2d592c35 |
340 | $self->_generate_call_code($name, 'coerce', "${value}", $coerce) |
341 | ); |
82a5b146 |
342 | } |
343 | |
a16d301e |
344 | sub generate_trigger { |
345 | my $self = shift; |
e57f338d |
346 | $self->{captures} = {}; |
a16d301e |
347 | my $code = $self->_generate_trigger(@_); |
e57f338d |
348 | ($code, delete $self->{captures}); |
a16d301e |
349 | } |
350 | |
351 | sub _generate_trigger { |
352 | my ($self, $name, $obj, $value, $trigger) = @_; |
6d377074 |
353 | $self->_generate_call_code($name, 'trigger', "${obj}, ${value}", $trigger); |
354 | } |
355 | |
356 | sub generate_isa_check { |
901efe1a |
357 | my ($self, @args) = @_; |
e57f338d |
358 | $self->{captures} = {}; |
901efe1a |
359 | my $code = $self->_generate_isa_check(@args); |
e57f338d |
360 | ($code, delete $self->{captures}); |
6d377074 |
361 | } |
362 | |
2d592c35 |
363 | sub _generate_die_prefix { |
364 | my ($self, $prefix, $inside) = @_; |
365 | "do {\n" |
bc65d744 |
366 | .' my $sig_die = $SIG{__DIE__} || sub { die $_[0] };'."\n" |
367 | .' local $SIG{__DIE__} = sub {'."\n" |
2d592c35 |
368 | .' $sig_die->(ref($_[0]) ? $_[0] : '.perlstring($prefix).'.$_[0]);'."\n" |
bc65d744 |
369 | .' };'."\n" |
2d592c35 |
370 | .$inside |
bc65d744 |
371 | ."}\n" |
6d377074 |
372 | } |
373 | |
2d592c35 |
374 | sub _generate_isa_check { |
234f614d |
375 | my ($self, $name, $value, $check, $init_arg) = @_; |
2d592c35 |
376 | $self->_generate_die_prefix( |
234f614d |
377 | "isa check for ${\_attr_desc($name, $init_arg)} failed: ", |
2d592c35 |
378 | $self->_generate_call_code($name, 'isa_check', $value, $check) |
379 | ); |
380 | } |
381 | |
6d377074 |
382 | sub _generate_call_code { |
383 | my ($self, $name, $type, $values, $sub) = @_; |
384 | if (my $quoted = quoted_from_sub($sub)) { |
625d6219 |
385 | my $code = $quoted->[1]; |
8c6626cf |
386 | if (my $captures = $quoted->[2]) { |
6d377074 |
387 | my $cap_name = qq{\$${type}_captures_for_${name}}; |
8c6626cf |
388 | $self->{captures}->{$cap_name} = \$captures; |
e57f338d |
389 | Sub::Quote::inlinify( |
159d9c5b |
390 | $code, $values, Sub::Quote::capture_unroll($cap_name, $captures, 6), 1 |
e57f338d |
391 | ); |
392 | } else { |
159d9c5b |
393 | Sub::Quote::inlinify($code, $values, undef, 1); |
8c6626cf |
394 | } |
901efe1a |
395 | } else { |
396 | my $cap_name = qq{\$${type}_for_${name}}; |
397 | $self->{captures}->{$cap_name} = \$sub; |
398 | "${cap_name}->(${values})"; |
625d6219 |
399 | } |
a16d301e |
400 | } |
401 | |
3a9a65a4 |
402 | sub generate_populate_set { |
403 | my $self = shift; |
e57f338d |
404 | $self->{captures} = {}; |
3a9a65a4 |
405 | my $code = $self->_generate_populate_set(@_); |
e57f338d |
406 | ($code, delete $self->{captures}); |
3a9a65a4 |
407 | } |
408 | |
409 | sub _generate_populate_set { |
234f614d |
410 | my ($self, $me, $name, $spec, $source, $test, $init_arg) = @_; |
4ced3a94 |
411 | if ($self->has_eager_default($name, $spec)) { |
3a9a65a4 |
412 | my $get_indent = ' ' x ($spec->{isa} ? 6 : 4); |
d02da2bc |
413 | my $get_default = $self->_generate_get_default( |
414 | '$new', $_, $spec |
415 | ); |
3a9a65a4 |
416 | my $get_value = |
d02da2bc |
417 | defined($spec->{init_arg}) |
418 | ? "(\n${get_indent} ${test}\n${get_indent} ? ${source}\n${get_indent} : " |
419 | .$get_default |
420 | ."\n${get_indent})" |
421 | : $get_default; |
b1f04da5 |
422 | if ($spec->{coerce}) { |
423 | $get_value = $self->_generate_coerce( |
424 | $name, $get_value, |
234f614d |
425 | $spec->{coerce}, $init_arg |
b1f04da5 |
426 | ) |
7fe3b886 |
427 | } |
3a9a65a4 |
428 | ($spec->{isa} |
429 | ? " {\n my \$value = ".$get_value.";\n " |
5d349892 |
430 | .$self->_generate_isa_check( |
234f614d |
431 | $name, '$value', $spec->{isa}, $init_arg |
5d349892 |
432 | ).";\n" |
32381de9 |
433 | .' '.$self->_generate_simple_set($me, $name, $spec, '$value').";\n" |
5d349892 |
434 | ." }\n" |
32381de9 |
435 | : ' '.$self->_generate_simple_set($me, $name, $spec, $get_value).";\n" |
3a9a65a4 |
436 | ) |
437 | .($spec->{trigger} |
438 | ? ' ' |
5d349892 |
439 | .$self->_generate_trigger( |
ceea0e38 |
440 | $name, $me, $self->_generate_simple_get($me, $name, $spec), |
5d349892 |
441 | $spec->{trigger} |
442 | )." if ${test};\n" |
3a9a65a4 |
443 | : '' |
444 | ); |
445 | } else { |
446 | " if (${test}) {\n" |
82a5b146 |
447 | .($spec->{coerce} |
448 | ? " $source = " |
449 | .$self->_generate_coerce( |
b1f04da5 |
450 | $name, $source, |
234f614d |
451 | $spec->{coerce}, $init_arg |
82a5b146 |
452 | ).";\n" |
453 | : "" |
454 | ) |
3a9a65a4 |
455 | .($spec->{isa} |
456 | ? " " |
5d349892 |
457 | .$self->_generate_isa_check( |
234f614d |
458 | $name, $source, $spec->{isa}, $init_arg |
5d349892 |
459 | ).";\n" |
3a9a65a4 |
460 | : "" |
461 | ) |
32381de9 |
462 | ." ".$self->_generate_simple_set($me, $name, $spec, $source).";\n" |
3a9a65a4 |
463 | .($spec->{trigger} |
5d349892 |
464 | ? " " |
465 | .$self->_generate_trigger( |
ceea0e38 |
466 | $name, $me, $self->_generate_simple_get($me, $name, $spec), |
5d349892 |
467 | $spec->{trigger} |
468 | ).";\n" |
469 | : "" |
3a9a65a4 |
470 | ) |
471 | ." }\n"; |
472 | } |
473 | } |
474 | |
873df570 |
475 | sub _generate_core_set { |
476 | my ($self, $me, $name, $spec, $value) = @_; |
477 | my $name_str = perlstring $name; |
478 | "${me}->{${name_str}} = ${value}"; |
479 | } |
480 | |
a16d301e |
481 | sub _generate_simple_set { |
32381de9 |
482 | my ($self, $me, $name, $spec, $value) = @_; |
a16d301e |
483 | my $name_str = perlstring $name; |
2215d4b9 |
484 | |
32381de9 |
485 | if ($spec->{weak_ref}) { |
6998abed |
486 | $value = '$preserve = '.$value; |
487 | my $simple = $self->_generate_core_set($me, $name, $spec, $value); |
faa9ce11 |
488 | require Scalar::Util; |
2215d4b9 |
489 | |
490 | # Perl < 5.8.3 can't weaken refs to readonly vars |
491 | # (e.g. string constants). This *can* be solved by: |
492 | # |
493 | #Internals::SetReadWrite($foo); |
494 | #Scalar::Util::weaken ($foo); |
495 | #Internals::SetReadOnly($foo); |
496 | # |
497 | # but requires XS and is just too damn crazy |
498 | # so simply throw a better exception |
f3dc0ac6 |
499 | my $weak_simple = "my \$preserve; Scalar::Util::weaken(${simple}); no warnings 'void'; \$preserve"; |
6998abed |
500 | Moo::_Utils::lt_5_8_3() ? <<"EOC" : $weak_simple; |
2215d4b9 |
501 | |
6998abed |
502 | my \$preserve; |
42ae0e0c |
503 | eval { Scalar::Util::weaken($simple); 1 } |
504 | ? do { no warnings 'void'; \$preserve; } |
505 | : do { |
506 | if( \$@ =~ /Modification of a read-only value attempted/) { |
507 | require Carp; |
508 | Carp::croak( sprintf ( |
509 | 'Reference to readonly value in "%s" can not be weakened on Perl < 5.8.3', |
510 | $name_str, |
511 | ) ); |
512 | } else { |
513 | die \$@; |
514 | } |
2215d4b9 |
515 | } |
2215d4b9 |
516 | EOC |
32381de9 |
517 | } else { |
6998abed |
518 | $self->_generate_core_set($me, $name, $spec, $value); |
32381de9 |
519 | } |
51a3b106 |
520 | } |
521 | |
522 | sub _generate_getset { |
a16d301e |
523 | my ($self, $name, $spec) = @_; |
dcae37d3 |
524 | q{(@_ > 1}."\n ? ".$self->_generate_set($name, $spec) |
f537c364 |
525 | ."\n : ".$self->_generate_get($name, $spec)."\n )"; |
51a3b106 |
526 | } |
527 | |
4db3a740 |
528 | sub _generate_delegation { |
529 | my ($self, $asserter, $target, $args) = @_; |
530 | my $arg_string = do { |
531 | if (@$args) { |
532 | # I could, I reckon, linearise out non-refs here using perlstring |
533 | # plus something to check for numbers but I'm unsure if it's worth it |
534 | $self->{captures}{'@curries'} = $args; |
535 | '@curries, @_'; |
536 | } else { |
537 | '@_'; |
538 | } |
539 | }; |
540 | "shift->${asserter}->${target}(${arg_string});"; |
541 | } |
542 | |
daa05b62 |
543 | sub _generate_xs { |
dcae37d3 |
544 | my ($self, $type, $into, $name, $slot) = @_; |
daa05b62 |
545 | Class::XSAccessor->import( |
e6f2e914 |
546 | class => $into, |
9f10cfe0 |
547 | $type => { $name => $slot }, |
548 | replace => 1, |
daa05b62 |
549 | ); |
901efe1a |
550 | $into->can($name); |
daa05b62 |
551 | } |
552 | |
02e9ef74 |
553 | sub default_construction_string { '{}' } |
554 | |
51a3b106 |
555 | 1; |