Commit | Line | Data |
4e036ee4 |
1 | |
2 | package Moose::Meta::TypeConstraint; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | use metaclass; |
7 | |
ed90007b |
8 | use overload '0+' => sub { refaddr(shift) }, # id an object |
9 | '""' => sub { shift->name }, # stringify to tc name |
72e389bf |
10 | bool => sub { 1 }, |
b644e331 |
11 | fallback => 1; |
900466d6 |
12 | |
477a812e |
13 | use Eval::Closure; |
dabed765 |
14 | use Scalar::Util qw(blessed refaddr); |
9f2230e9 |
15 | use Sub::Name qw(subname); |
5a18346b |
16 | use Try::Tiny; |
66811d63 |
17 | |
e606ae5f |
18 | use base qw(Class::MOP::Object); |
19 | |
dc2b7cc8 |
20 | __PACKAGE__->meta->add_attribute('name' => ( |
21 | reader => 'name', |
22 | Class::MOP::_definition_context(), |
23 | )); |
3726f905 |
24 | __PACKAGE__->meta->add_attribute('parent' => ( |
25 | reader => 'parent', |
26 | predicate => 'has_parent', |
dc2b7cc8 |
27 | Class::MOP::_definition_context(), |
3726f905 |
28 | )); |
baf26cc6 |
29 | |
30 | my $null_constraint = sub { 1 }; |
d67145ed |
31 | __PACKAGE__->meta->add_attribute('constraint' => ( |
8de73ff1 |
32 | reader => 'constraint', |
33 | writer => '_set_constraint', |
dc2b7cc8 |
34 | default => sub { $null_constraint }, |
35 | Class::MOP::_definition_context(), |
d67145ed |
36 | )); |
dc2b7cc8 |
37 | |
76d37e5a |
38 | __PACKAGE__->meta->add_attribute('message' => ( |
39 | accessor => 'message', |
dc2b7cc8 |
40 | predicate => 'has_message', |
41 | Class::MOP::_definition_context(), |
76d37e5a |
42 | )); |
dc2b7cc8 |
43 | |
92a88343 |
44 | __PACKAGE__->meta->add_attribute('_default_message' => ( |
45 | accessor => '_default_message', |
dc2b7cc8 |
46 | Class::MOP::_definition_context(), |
92a88343 |
47 | )); |
dc2b7cc8 |
48 | |
92a88343 |
49 | # can't make this a default because it has to close over the type name, and |
50 | # cmop attributes don't have lazy |
51 | my $_default_message_generator = sub { |
52 | my $name = shift; |
53 | sub { |
54 | my $value = shift; |
55 | # have to load it late like this, since it uses Moose itself |
56 | my $can_partialdump = try { |
57 | # versions prior to 0.14 had a potential infinite loop bug |
58 | Class::MOP::load_class('Devel::PartialDump', { -version => 0.14 }); |
59 | 1; |
60 | }; |
61 | if ($can_partialdump) { |
62 | $value = Devel::PartialDump->new->dump($value); |
63 | } |
64 | else { |
65 | $value = (defined $value ? overload::StrVal($value) : 'undef'); |
66 | } |
67 | return "Validation failed for '" . $name . "' with value $value"; |
68 | } |
69 | }; |
a27aa600 |
70 | __PACKAGE__->meta->add_attribute('coercion' => ( |
71 | accessor => 'coercion', |
dc2b7cc8 |
72 | predicate => 'has_coercion', |
73 | Class::MOP::_definition_context(), |
a27aa600 |
74 | )); |
70ea9161 |
75 | |
c8cf9aaa |
76 | __PACKAGE__->meta->add_attribute('hand_optimized_type_constraint' => ( |
77 | init_arg => 'optimized', |
78 | accessor => 'hand_optimized_type_constraint', |
e27dfc11 |
79 | predicate => 'has_hand_optimized_type_constraint', |
dc2b7cc8 |
80 | Class::MOP::_definition_context(), |
c8cf9aaa |
81 | )); |
82 | |
4e36cf24 |
83 | __PACKAGE__->meta->add_attribute('inlined' => ( |
7487e61c |
84 | init_arg => 'inlined', |
4e36cf24 |
85 | accessor => 'inlined', |
7487e61c |
86 | predicate => '_has_inlined_type_constraint', |
dc2b7cc8 |
87 | Class::MOP::_definition_context(), |
4e36cf24 |
88 | )); |
89 | |
9c44971f |
90 | __PACKAGE__->meta->add_attribute('inline_environment' => ( |
91 | init_arg => 'inline_environment', |
ca789903 |
92 | accessor => '_inline_environment', |
9c44971f |
93 | default => sub { {} }, |
dc2b7cc8 |
94 | Class::MOP::_definition_context(), |
9c44971f |
95 | )); |
96 | |
bd72f3c8 |
97 | sub parents { |
98 | my $self; |
99 | $self->parent; |
100 | } |
101 | |
3726f905 |
102 | # private accessors |
103 | |
104 | __PACKAGE__->meta->add_attribute('compiled_type_constraint' => ( |
105 | accessor => '_compiled_type_constraint', |
dc2b7cc8 |
106 | predicate => '_has_compiled_type_constraint', |
107 | Class::MOP::_definition_context(), |
3726f905 |
108 | )); |
dc2b7cc8 |
109 | |
22aed3c0 |
110 | __PACKAGE__->meta->add_attribute('package_defined_in' => ( |
dc2b7cc8 |
111 | accessor => '_package_defined_in', |
112 | Class::MOP::_definition_context(), |
22aed3c0 |
113 | )); |
114 | |
e27dfc11 |
115 | sub new { |
a27aa600 |
116 | my $class = shift; |
8534c69a |
117 | my ($first, @rest) = @_; |
118 | my %args = ref $first ? %$first : $first ? ($first, @rest) : (); |
119 | $args{name} = $args{name} ? "$args{name}" : "__ANON__"; |
70ea9161 |
120 | |
8534c69a |
121 | my $self = $class->_new(%args); |
3726f905 |
122 | $self->compile_type_constraint() |
123 | unless $self->_has_compiled_type_constraint; |
92a88343 |
124 | $self->_default_message($_default_message_generator->($self->name)) |
125 | unless $self->has_message; |
66811d63 |
126 | return $self; |
127 | } |
128 | |
8534c69a |
129 | |
130 | |
70ea9161 |
131 | sub coerce { |
132 | my $self = shift; |
133 | |
134 | my $coercion = $self->coercion; |
135 | |
136 | unless ($coercion) { |
137 | require Moose; |
138 | Moose->throw_error("Cannot coerce without a type coercion"); |
139 | } |
140 | |
02679ba4 |
141 | return $_[0] if $self->check($_[0]); |
142 | |
70ea9161 |
143 | return $coercion->coerce(@_); |
144 | } |
a1257460 |
145 | |
bb6ac54a |
146 | sub assert_coerce { |
147 | my $self = shift; |
148 | |
149 | my $coercion = $self->coercion; |
150 | |
151 | unless ($coercion) { |
152 | require Moose; |
153 | Moose->throw_error("Cannot coerce without a type coercion"); |
154 | } |
155 | |
156 | return $_[0] if $self->check($_[0]); |
157 | |
158 | my $result = $coercion->coerce(@_); |
159 | |
160 | $self->assert_valid($result); |
161 | |
162 | return $result; |
163 | } |
164 | |
a1257460 |
165 | sub check { |
166 | my ($self, @args) = @_; |
167 | my $constraint_subref = $self->_compiled_type_constraint; |
168 | return $constraint_subref->(@args) ? 1 : undef; |
169 | } |
170 | |
e27dfc11 |
171 | sub validate { |
76d37e5a |
172 | my ($self, $value) = @_; |
173 | if ($self->_compiled_type_constraint->($value)) { |
174 | return undef; |
175 | } |
176 | else { |
688fcdda |
177 | $self->get_message($value); |
76d37e5a |
178 | } |
179 | } |
180 | |
7c047a36 |
181 | sub can_be_inlined { |
7487e61c |
182 | my $self = shift; |
183 | |
92efe680 |
184 | if ( $self->has_parent && $self->constraint == $null_constraint ) { |
7c047a36 |
185 | return $self->parent->can_be_inlined; |
7487e61c |
186 | } |
187 | |
188 | return $self->_has_inlined_type_constraint; |
189 | } |
190 | |
4e36cf24 |
191 | sub _inline_check { |
192 | my $self = shift; |
193 | |
7c047a36 |
194 | unless ( $self->can_be_inlined ) { |
3f9c18f3 |
195 | require Moose; |
196 | Moose->throw_error( 'Cannot inline a type constraint check for ' . $self->name ); |
197 | } |
4e36cf24 |
198 | |
92efe680 |
199 | if ( $self->has_parent && $self->constraint == $null_constraint ) { |
7487e61c |
200 | return $self->parent->_inline_check(@_); |
201 | } |
202 | |
e6fff671 |
203 | return '( do { ' . $self->inlined->( $self, @_ ) . ' } )'; |
4e36cf24 |
204 | } |
205 | |
ca789903 |
206 | sub inline_environment { |
207 | my $self = shift; |
208 | |
209 | if ( $self->has_parent && $self->constraint == $null_constraint ) { |
210 | return $self->parent->inline_environment; |
211 | } |
212 | |
213 | return $self->_inline_environment; |
214 | } |
215 | |
c24269b3 |
216 | sub assert_valid { |
217 | my ($self, $value) = @_; |
218 | |
219 | my $error = $self->validate($value); |
220 | return 1 if ! defined $error; |
221 | |
222 | require Moose; |
223 | Moose->throw_error($error); |
224 | } |
225 | |
688fcdda |
226 | sub get_message { |
227 | my ($self, $value) = @_; |
92a88343 |
228 | my $msg = $self->message || $self->_default_message; |
229 | local $_ = $value; |
230 | return $msg->($value); |
688fcdda |
231 | } |
232 | |
3726f905 |
233 | ## type predicates ... |
234 | |
d9e17f80 |
235 | sub equals { |
236 | my ( $self, $type_or_name ) = @_; |
237 | |
e606ae5f |
238 | my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name) or return; |
dabed765 |
239 | |
0677975f |
240 | return 1 if $self == $other; |
dabed765 |
241 | |
242 | if ( $self->has_hand_optimized_type_constraint and $other->has_hand_optimized_type_constraint ) { |
243 | return 1 if $self->hand_optimized_type_constraint == $other->hand_optimized_type_constraint; |
244 | } |
245 | |
246 | return unless $self->constraint == $other->constraint; |
247 | |
248 | if ( $self->has_parent ) { |
249 | return unless $other->has_parent; |
250 | return unless $self->parent->equals( $other->parent ); |
251 | } else { |
252 | return if $other->has_parent; |
253 | } |
d9e17f80 |
254 | |
05a5763c |
255 | return; |
d9e17f80 |
256 | } |
257 | |
b26e162e |
258 | sub is_a_type_of { |
d9e17f80 |
259 | my ($self, $type_or_name) = @_; |
260 | |
e606ae5f |
261 | my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name) or return; |
d9e17f80 |
262 | |
263 | ($self->equals($type) || $self->is_subtype_of($type)); |
b26e162e |
264 | } |
265 | |
cce8198b |
266 | sub is_subtype_of { |
d9e17f80 |
267 | my ($self, $type_or_name) = @_; |
268 | |
e606ae5f |
269 | my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name) or return; |
d9e17f80 |
270 | |
cce8198b |
271 | my $current = $self; |
d9e17f80 |
272 | |
cce8198b |
273 | while (my $parent = $current->parent) { |
d9e17f80 |
274 | return 1 if $parent->equals($type); |
cce8198b |
275 | $current = $parent; |
276 | } |
d9e17f80 |
277 | |
cce8198b |
278 | return 0; |
279 | } |
280 | |
3726f905 |
281 | ## compiling the type constraint |
282 | |
283 | sub compile_type_constraint { |
284 | my $self = shift; |
285 | $self->_compiled_type_constraint($self->_actually_compile_type_constraint); |
451c8248 |
286 | } |
287 | |
3726f905 |
288 | ## type compilers ... |
289 | |
290 | sub _actually_compile_type_constraint { |
291 | my $self = shift; |
e27dfc11 |
292 | |
3726f905 |
293 | return $self->_compile_hand_optimized_type_constraint |
294 | if $self->has_hand_optimized_type_constraint; |
e27dfc11 |
295 | |
7c047a36 |
296 | if ( $self->can_be_inlined ) { |
477a812e |
297 | return eval_closure( |
9c44971f |
298 | source => 'sub { ' . $self->_inline_check('$_[0]') . ' }', |
299 | environment => $self->inline_environment, |
477a812e |
300 | ); |
43837b8a |
301 | } |
302 | |
3726f905 |
303 | my $check = $self->constraint; |
70ea9161 |
304 | unless ( defined $check ) { |
305 | require Moose; |
306 | Moose->throw_error( "Could not compile type constraint '" |
e27dfc11 |
307 | . $self->name |
70ea9161 |
308 | . "' because no constraint check" ); |
309 | } |
e27dfc11 |
310 | |
3726f905 |
311 | return $self->_compile_subtype($check) |
312 | if $self->has_parent; |
e27dfc11 |
313 | |
3726f905 |
314 | return $self->_compile_type($check); |
315 | } |
316 | |
317 | sub _compile_hand_optimized_type_constraint { |
318 | my $self = shift; |
e27dfc11 |
319 | |
3726f905 |
320 | my $type_constraint = $self->hand_optimized_type_constraint; |
e27dfc11 |
321 | |
70ea9161 |
322 | unless ( ref $type_constraint ) { |
323 | require Moose; |
70ea9161 |
324 | Moose->throw_error("Hand optimized type constraint is not a code reference"); |
325 | } |
42bc21a4 |
326 | |
327 | return $type_constraint; |
3726f905 |
328 | } |
329 | |
330 | sub _compile_subtype { |
331 | my ($self, $check) = @_; |
e27dfc11 |
332 | |
baf26cc6 |
333 | # gather all the parent constraintss in order |
3726f905 |
334 | my @parents; |
baf26cc6 |
335 | my $optimized_parent; |
3726f905 |
336 | foreach my $parent ($self->_collect_all_parents) { |
baf26cc6 |
337 | # if a parent is optimized, the optimized constraint already includes |
338 | # all of its parents tcs, so we can break the loop |
3726f905 |
339 | if ($parent->has_hand_optimized_type_constraint) { |
baf26cc6 |
340 | push @parents => $optimized_parent = $parent->hand_optimized_type_constraint; |
e27dfc11 |
341 | last; |
3726f905 |
342 | } |
343 | else { |
baf26cc6 |
344 | push @parents => $parent->constraint; |
3726f905 |
345 | } |
346 | } |
e27dfc11 |
347 | |
baf26cc6 |
348 | @parents = grep { $_ != $null_constraint } reverse @parents; |
349 | |
350 | unless ( @parents ) { |
351 | return $self->_compile_type($check); |
352 | } elsif( $optimized_parent and @parents == 1 ) { |
353 | # the case of just one optimized parent is optimized to prevent |
354 | # looping and the unnecessary localization |
b5981f07 |
355 | if ( $check == $null_constraint ) { |
356 | return $optimized_parent; |
357 | } else { |
9f2230e9 |
358 | return subname($self->name, sub { |
b5981f07 |
359 | return undef unless $optimized_parent->($_[0]); |
a1257460 |
360 | my (@args) = @_; |
361 | local $_ = $args[0]; |
362 | $check->(@args); |
b5981f07 |
363 | }); |
364 | } |
baf26cc6 |
365 | } else { |
366 | # general case, check all the constraints, from the first parent to ourselves |
b5981f07 |
367 | my @checks = @parents; |
368 | push @checks, $check if $check != $null_constraint; |
9f2230e9 |
369 | return subname($self->name => sub { |
a1257460 |
370 | my (@args) = @_; |
371 | local $_ = $args[0]; |
baf26cc6 |
372 | foreach my $check (@checks) { |
a1257460 |
373 | return undef unless $check->(@args); |
baf26cc6 |
374 | } |
375 | return 1; |
376 | }); |
377 | } |
3726f905 |
378 | } |
379 | |
380 | sub _compile_type { |
381 | my ($self, $check) = @_; |
baf26cc6 |
382 | |
383 | return $check if $check == $null_constraint; # Item, Any |
384 | |
9f2230e9 |
385 | return subname($self->name => sub { |
a1257460 |
386 | my (@args) = @_; |
387 | local $_ = $args[0]; |
388 | $check->(@args); |
1b2aea39 |
389 | }); |
3726f905 |
390 | } |
391 | |
392 | ## other utils ... |
393 | |
394 | sub _collect_all_parents { |
395 | my $self = shift; |
396 | my @parents; |
397 | my $current = $self->parent; |
398 | while (defined $current) { |
399 | push @parents => $current; |
400 | $current = $current->parent; |
401 | } |
402 | return @parents; |
403 | } |
404 | |
85a9908f |
405 | sub create_child_type { |
9ceb576e |
406 | my ($self, %opts) = @_; |
407 | my $class = ref $self; |
408 | return $class->new(%opts, parent => $self); |
409 | } |
410 | |
4e036ee4 |
411 | 1; |
412 | |
ad46f524 |
413 | # ABSTRACT: The Moose Type Constraint metaclass |
414 | |
4e036ee4 |
415 | __END__ |
416 | |
417 | =pod |
418 | |
4e036ee4 |
419 | =head1 DESCRIPTION |
420 | |
cfd006f0 |
421 | This class represents a single type constraint. Moose's built-in type |
76127c77 |
422 | constraints, as well as constraints you define, are all stored in a |
cfd006f0 |
423 | L<Moose::Meta::TypeConstraint::Registry> object as objects of this |
424 | class. |
6ba6d68c |
425 | |
baf46b9e |
426 | =head1 INHERITANCE |
427 | |
428 | C<Moose::Meta::TypeConstraint> is a subclass of L<Class::MOP::Object>. |
429 | |
4e036ee4 |
430 | =head1 METHODS |
431 | |
432 | =over 4 |
433 | |
cfd006f0 |
434 | =item B<< Moose::Meta::TypeConstraint->new(%options) >> |
4e036ee4 |
435 | |
cfd006f0 |
436 | This creates a new type constraint based on the provided C<%options>: |
4e036ee4 |
437 | |
cfd006f0 |
438 | =over 8 |
d9e17f80 |
439 | |
cfd006f0 |
440 | =item * name |
e606ae5f |
441 | |
cfd006f0 |
442 | The constraint name. If a name is not provided, it will be set to |
443 | "__ANON__". |
b26e162e |
444 | |
cfd006f0 |
445 | =item * parent |
b26e162e |
446 | |
cfd006f0 |
447 | A C<Moose::Meta::TypeConstraint> object which is the parent type for |
448 | the type being created. This is optional. |
cce8198b |
449 | |
cfd006f0 |
450 | =item * constraint |
e606ae5f |
451 | |
cfd006f0 |
452 | This is the subroutine reference that implements the actual constraint |
453 | check. This defaults to a subroutine which always returns true. |
6ba6d68c |
454 | |
cfd006f0 |
455 | =item * message |
0a5bd159 |
456 | |
cfd006f0 |
457 | A subroutine reference which is used to generate an error message when |
458 | the constraint fails. This is optional. |
0a5bd159 |
459 | |
cfd006f0 |
460 | =item * coercion |
76d37e5a |
461 | |
cfd006f0 |
462 | A L<Moose::Meta::TypeCoercion> object representing the coercions to |
463 | the type. This is optional. |
76d37e5a |
464 | |
7142d232 |
465 | =item * inlined |
466 | |
467 | A subroutine which returns a string suitable for inlining this type |
468 | constraint. It will be called as a method on the type constraint object, and |
469 | will receive a single additional parameter, a variable name to be tested |
470 | (usually C<"$_"> or C<"$_[0]">. |
471 | |
472 | This is optional. |
473 | |
474 | =item * inline_environment |
475 | |
476 | A hash reference of variables to close over. The keys are variables names, and |
477 | the values are I<references> to the variables. |
478 | |
cfd006f0 |
479 | =item * optimized |
76d37e5a |
480 | |
7142d232 |
481 | B<This option is deprecated.> |
482 | |
cfd006f0 |
483 | This is a variant of the C<constraint> parameter that is somehow |
484 | optimized. Typically, this means incorporating both the type's |
485 | constraint and all of its parents' constraints into a single |
486 | subroutine reference. |
6ba6d68c |
487 | |
cfd006f0 |
488 | =back |
4e036ee4 |
489 | |
cfd006f0 |
490 | =item B<< $constraint->equals($type_name_or_object) >> |
e606ae5f |
491 | |
cfd006f0 |
492 | Returns true if the supplied name or type object is the same as the |
493 | current type. |
66811d63 |
494 | |
cfd006f0 |
495 | =item B<< $constraint->is_subtype_of($type_name_or_object) >> |
e606ae5f |
496 | |
cfd006f0 |
497 | Returns true if the supplied name or type object is a parent of the |
498 | current type. |
3726f905 |
499 | |
cfd006f0 |
500 | =item B<< $constraint->is_a_type_of($type_name_or_object) >> |
e606ae5f |
501 | |
cfd006f0 |
502 | Returns true if the given type is the same as the current type, or is |
503 | a parent of the current type. This is a shortcut for checking |
504 | C<equals> and C<is_subtype_of>. |
d9e17f80 |
505 | |
cfd006f0 |
506 | =item B<< $constraint->coerce($value) >> |
2f7e4042 |
507 | |
b2894aea |
508 | This will attempt to coerce the value to the type. If the type does not |
cfd006f0 |
509 | have any defined coercions this will throw an error. |
66811d63 |
510 | |
572b5187 |
511 | If no coercion can produce a value matching C<$constraint>, the original |
512 | value is returned. |
513 | |
086c6b6c |
514 | =item B<< $constraint->assert_coerce($value) >> |
572b5187 |
515 | |
516 | This method behaves just like C<coerce>, but if the result is not valid |
517 | according to C<$constraint>, an error is thrown. |
518 | |
cfd006f0 |
519 | =item B<< $constraint->check($value) >> |
2f7e4042 |
520 | |
cfd006f0 |
521 | Returns true if the given value passes the constraint for the type. |
76d37e5a |
522 | |
cfd006f0 |
523 | =item B<< $constraint->validate($value) >> |
2f7e4042 |
524 | |
cfd006f0 |
525 | This is similar to C<check>. However, if the type I<is valid> then the |
526 | method returns an explicit C<undef>. If the type is not valid, we call |
527 | C<< $self->get_message($value) >> internally to generate an error |
528 | message. |
76d37e5a |
529 | |
952320e0 |
530 | =item B<< $constraint->assert_valid($value) >> |
531 | |
532 | Like C<check> and C<validate>, this method checks whether C<$value> is |
533 | valid under the constraint. If it is, it will return true. If it is not, |
534 | an exception will be thrown with the results of |
535 | C<< $self->get_message($value) >>. |
536 | |
cfd006f0 |
537 | =item B<< $constraint->name >> |
2f7e4042 |
538 | |
cfd006f0 |
539 | Returns the type's name, as provided to the constructor. |
688fcdda |
540 | |
cfd006f0 |
541 | =item B<< $constraint->parent >> |
2f7e4042 |
542 | |
cfd006f0 |
543 | Returns the type's parent, as provided to the constructor, if any. |
4e036ee4 |
544 | |
cfd006f0 |
545 | =item B<< $constraint->has_parent >> |
2f7e4042 |
546 | |
cfd006f0 |
547 | Returns true if the type has a parent type. |
a27aa600 |
548 | |
cfd006f0 |
549 | =item B<< $constraint->parents >> |
2f7e4042 |
550 | |
cfd006f0 |
551 | A synonym for C<parent>. This is useful for polymorphism with types |
552 | that can have more than one parent. |
c8cf9aaa |
553 | |
cfd006f0 |
554 | =item B<< $constraint->constraint >> |
c8cf9aaa |
555 | |
cfd006f0 |
556 | Returns the type's constraint, as provided to the constructor. |
9ceb576e |
557 | |
cfd006f0 |
558 | =item B<< $constraint->get_message($value) >> |
4e036ee4 |
559 | |
cfd006f0 |
560 | This generates a method for the given value. If the type does not have |
561 | an explicit message, we generate a default message. |
3726f905 |
562 | |
cfd006f0 |
563 | =item B<< $constraint->has_message >> |
564 | |
565 | Returns true if the type has a message. |
566 | |
567 | =item B<< $constraint->message >> |
568 | |
569 | Returns the type's message as a subroutine reference. |
570 | |
571 | =item B<< $constraint->coercion >> |
572 | |
573 | Returns the type's L<Moose::Meta::TypeCoercion> object, if one |
574 | exists. |
575 | |
576 | =item B<< $constraint->has_coercion >> |
577 | |
578 | Returns true if the type has a coercion. |
579 | |
7142d232 |
580 | =item B<< $constraint->can_be_inlined >> |
581 | |
582 | Returns true if this type constraint can be inlined. A type constraint which |
583 | subtypes an inlinable constraint and does not add an additional constraint |
584 | "inherits" its parent type's inlining. |
585 | |
cfd006f0 |
586 | =item B<< $constraint->hand_optimized_type_constraint >> |
587 | |
7142d232 |
588 | B<This method is deprecated.> |
589 | |
cfd006f0 |
590 | Returns the type's hand optimized constraint, as provided to the |
591 | constructor via the C<optimized> option. |
592 | |
593 | =item B<< $constraint->has_hand_optimized_type_constraint >> |
594 | |
7142d232 |
595 | B<This method is deprecated.> |
596 | |
cfd006f0 |
597 | Returns true if the type has an optimized constraint. |
598 | |
599 | =item B<< $constraint->create_child_type(%options) >> |
451c8248 |
600 | |
cfd006f0 |
601 | This returns a new type constraint of the same class using the |
602 | provided C<%options>. The C<parent> option will be the current type. |
3726f905 |
603 | |
cfd006f0 |
604 | This method exists so that subclasses of this class can override this |
605 | behavior and change how child types are created. |
451c8248 |
606 | |
607 | =back |
608 | |
4e036ee4 |
609 | =head1 BUGS |
610 | |
d4048ef3 |
611 | See L<Moose/BUGS> for details on reporting bugs. |
4e036ee4 |
612 | |
c8cf9aaa |
613 | =cut |