Commit | Line | Data |
3b46bd49 |
1 | package Mouse::Util::TypeConstraints; |
d60c78b9 |
2 | use strict; |
3 | use warnings; |
f3bb863f |
4 | |
5 | use Exporter; |
9baf5d6b |
6 | |
f5ee065f |
7 | use Carp qw(confess); |
6c169c50 |
8 | use Scalar::Util qw/blessed looks_like_number openhandle/; |
6d28c5cf |
9 | |
2efc0af1 |
10 | use Mouse::Util qw(does_role not_supported); |
a497c7d3 |
11 | use Mouse::Meta::Module; # class_of |
684db121 |
12 | use Mouse::Meta::TypeConstraint; |
d60c78b9 |
13 | |
f3bb863f |
14 | our @ISA = qw(Exporter); |
139d92d2 |
15 | our @EXPORT = qw( |
d44f0d03 |
16 | as where message from via type subtype coerce class_type role_type enum |
ccf44227 |
17 | find_type_constraint |
139d92d2 |
18 | ); |
19 | |
cceb0e25 |
20 | my %TYPE; |
8a7f2a8a |
21 | my %COERCE; |
22 | my %COERCE_KEYS; |
4188b837 |
23 | |
139d92d2 |
24 | sub as ($) { |
cd2b9201 |
25 | return(as => $_[0]); |
61a02a3a |
26 | } |
139d92d2 |
27 | sub where (&) { |
cd2b9201 |
28 | return(where => $_[0]) |
61a02a3a |
29 | } |
0f1dae9a |
30 | sub message (&) { |
cd2b9201 |
31 | return(message => $_[0]) |
61a02a3a |
32 | } |
33 | |
73766a27 |
34 | sub from { @_ } |
cd2b9201 |
35 | sub via (&) { $_[0] } |
61a02a3a |
36 | |
321e5271 |
37 | BEGIN { |
993e62a7 |
38 | my %builtins = ( |
f5ee065f |
39 | Any => undef, # null check |
40 | Item => undef, # null check |
41 | Maybe => undef, # null check |
73766a27 |
42 | |
43 | Bool => sub { $_[0] ? $_[0] eq '1' : 1 }, |
c91d12e0 |
44 | Undef => sub { !defined($_[0]) }, |
45 | Defined => sub { defined($_[0]) }, |
46 | Value => sub { defined($_[0]) && !ref($_[0]) }, |
47 | Num => sub { !ref($_[0]) && looks_like_number($_[0]) }, |
48 | Int => sub { defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ }, |
49 | Str => sub { defined($_[0]) && !ref($_[0]) }, |
c91d12e0 |
50 | Ref => sub { ref($_[0]) }, |
51 | |
52 | ScalarRef => sub { ref($_[0]) eq 'SCALAR' }, |
53 | ArrayRef => sub { ref($_[0]) eq 'ARRAY' }, |
54 | HashRef => sub { ref($_[0]) eq 'HASH' }, |
55 | CodeRef => sub { ref($_[0]) eq 'CODE' }, |
56 | RegexpRef => sub { ref($_[0]) eq 'Regexp' }, |
57 | GlobRef => sub { ref($_[0]) eq 'GLOB' }, |
381f326a |
58 | |
59 | FileHandle => sub { |
c91d12e0 |
60 | ref($_[0]) eq 'GLOB' && openhandle($_[0]) |
381f326a |
61 | or |
c91d12e0 |
62 | blessed($_[0]) && $_[0]->isa("IO::Handle") |
abe4e887 |
63 | }, |
381f326a |
64 | |
c91d12e0 |
65 | Object => sub { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }, |
73766a27 |
66 | |
67 | ClassName => sub { Mouse::Util::is_class_loaded($_[0]) }, |
d4571def |
68 | RoleName => sub { (Mouse::Util::find_meta($_[0]) || return 0)->isa('Mouse::Meta::Role') }, |
8a7f2a8a |
69 | ); |
993e62a7 |
70 | |
71 | while (my ($name, $code) = each %builtins) { |
73766a27 |
72 | $TYPE{$name} = Mouse::Meta::TypeConstraint->new( |
3b89ea91 |
73 | name => $name, |
74 | optimized => $code, |
73766a27 |
75 | ); |
78b13827 |
76 | } |
d3982c7e |
77 | |
f5ee065f |
78 | sub optimized_constraints { |
79 | Carp::cluck('optimized_constraints() has been deprecated'); |
80 | return \%TYPE; |
81 | } |
d4571def |
82 | |
993e62a7 |
83 | my @builtins = keys %TYPE; |
84 | sub list_all_builtin_type_constraints { @builtins } |
85 | |
86 | sub list_all_type_constraints { keys %TYPE } |
381f326a |
87 | } |
d3982c7e |
88 | |
f5ee065f |
89 | sub _create_type{ |
90 | my $mode = shift; |
91 | |
73766a27 |
92 | my $name; |
f5ee065f |
93 | my %args; |
73766a27 |
94 | |
f5ee065f |
95 | if(@_ == 1 && ref $_[0]){ # @_ : { name => $name, where => ... } |
96 | %args = %{$_[0]}; |
73766a27 |
97 | } |
f5ee065f |
98 | elsif(@_ == 2 && ref $_[1]){ # @_ : $name => { where => ... } |
73766a27 |
99 | $name = $_[0]; |
f5ee065f |
100 | %args = %{$_[1]}; |
73766a27 |
101 | } |
f5ee065f |
102 | elsif(@_ % 2){ # @_ : $name => ( where => ... ) |
103 | ($name, %args) = @_; |
73766a27 |
104 | } |
f5ee065f |
105 | else{ # @_ : (name => $name, where => ...) |
106 | %args = @_; |
73766a27 |
107 | } |
108 | |
f5ee065f |
109 | if(!defined $name){ |
110 | if(!defined($name = $args{name})){ |
111 | $name = '__ANON__'; |
112 | } |
cd2b9201 |
113 | } |
d4571def |
114 | |
f5ee065f |
115 | $args{name} = $name; |
7dbebb1b |
116 | |
f5ee065f |
117 | my $package_defined_in = $args{package_defined_in} ||= caller(1); |
d4571def |
118 | |
f5ee065f |
119 | my $existing = $TYPE{$name}; |
120 | if($existing && $existing->{package_defined_in} ne $package_defined_in){ |
121 | confess("The type constraint '$name' has already been created in " |
122 | . "$existing->{package_defined_in} and cannot be created again in $package_defined_in"); |
123 | } |
d4571def |
124 | |
24410e3a |
125 | $args{constraint} = delete($args{where}) if exists $args{where}; |
126 | $args{optimized} = delete $args{optimized_as} if exists $args{optimized_as}; |
0d9fea22 |
127 | |
f5ee065f |
128 | my $constraint; |
129 | if($mode eq 'subtype'){ |
24410e3a |
130 | my $parent = delete($args{as}) |
131 | or confess('A subtype cannot consist solely of a name, it must have a parent'); |
7a50b450 |
132 | |
24410e3a |
133 | $constraint = find_or_create_isa_type_constraint($parent)->create_child_type(%args); |
7a50b450 |
134 | } |
135 | else{ |
f5ee065f |
136 | $constraint = Mouse::Meta::TypeConstraint->new(%args); |
73766a27 |
137 | } |
7dbebb1b |
138 | |
f5ee065f |
139 | return $TYPE{$name} = $constraint; |
140 | } |
7dbebb1b |
141 | |
f5ee065f |
142 | sub type { |
143 | return _create_type('type', @_); |
144 | } |
d4571def |
145 | |
f5ee065f |
146 | sub subtype { |
147 | return _create_type('subtype', @_); |
4188b837 |
148 | } |
149 | |
139d92d2 |
150 | sub coerce { |
ffbbf459 |
151 | my $type_name = shift; |
61a02a3a |
152 | |
ffbbf459 |
153 | my $type = find_type_constraint($type_name) |
154 | or confess("Cannot find type '$type_name', perhaps you forgot to load it."); |
61a02a3a |
155 | |
ffbbf459 |
156 | $type->_add_type_coercions(@_); |
cd2b9201 |
157 | return; |
4188b837 |
158 | } |
159 | |
139d92d2 |
160 | sub class_type { |
ecc6e3b1 |
161 | my($name, $conf) = @_; |
d9f8c878 |
162 | if ($conf && $conf->{class}) { |
163 | # No, you're using this wrong |
164 | warn "class_type() should be class_type(ClassName). Perhaps you're looking for subtype $name => as '$conf->{class}'?"; |
f5ee065f |
165 | _create_type 'type', $name => ( |
166 | as => $conf->{class}, |
167 | |
168 | type => 'Class', |
169 | ); |
a497c7d3 |
170 | } |
171 | else { |
f5ee065f |
172 | _create_type 'type', $name => ( |
173 | optimized_as => sub { blessed($_[0]) && $_[0]->isa($name) }, |
174 | |
175 | type => 'Class', |
d9f8c878 |
176 | ); |
177 | } |
ecc6e3b1 |
178 | } |
179 | |
139d92d2 |
180 | sub role_type { |
47f36c05 |
181 | my($name, $conf) = @_; |
f5ee065f |
182 | my $role = ($conf && $conf->{role}) ? $conf->{role} : $name; |
183 | _create_type 'type', $name => ( |
184 | optimized_as => sub { blessed($_[0]) && does_role($_[0], $role) }, |
185 | |
186 | type => 'Role', |
61a02a3a |
187 | ); |
47f36c05 |
188 | } |
189 | |
4188b837 |
190 | sub typecast_constraints { |
ffbbf459 |
191 | my($class, $pkg, $type, $value) = @_; |
2efc0af1 |
192 | Carp::croak("wrong arguments count") unless @_ == 4; |
eec1bb49 |
193 | |
e763d56e |
194 | Carp::cluck("typecast_constraints() has been deprecated, which was an internal utility anyway"); |
195 | |
ffbbf459 |
196 | return $type->coerce($value); |
4188b837 |
197 | } |
198 | |
d44f0d03 |
199 | sub enum { |
f5ee065f |
200 | my($name, %valid); |
201 | |
01904723 |
202 | # enum ['small', 'medium', 'large'] |
203 | if (ref($_[0]) eq 'ARRAY') { |
f5ee065f |
204 | %valid = map{ $_ => undef } @{ $_[0] }; |
205 | $name = sprintf '(%s)', join '|', sort @{$_[0]}; |
206 | } |
207 | # enum size => 'small', 'medium', 'large' |
208 | else{ |
209 | $name = shift; |
210 | %valid = map{ $_ => undef } @_; |
211 | } |
212 | return _create_type 'type', $name => ( |
213 | optimized_as => sub{ defined($_[0]) && !ref($_[0]) && exists $valid{$_[0]} }, |
214 | |
215 | type => 'Enum', |
216 | ); |
217 | } |
218 | |
219 | sub _find_or_create_regular_type{ |
220 | my($spec) = @_; |
221 | |
222 | return $TYPE{$spec} if exists $TYPE{$spec}; |
01904723 |
223 | |
f5ee065f |
224 | my $meta = Mouse::Meta::Module::class_of($spec); |
225 | |
226 | if(!$meta){ |
227 | return; |
01904723 |
228 | } |
229 | |
f5ee065f |
230 | my $check; |
231 | my $type; |
57f0e313 |
232 | if($meta->isa('Mouse::Meta::Role')){ |
f5ee065f |
233 | $check = sub{ |
234 | return blessed($_[0]) && $_[0]->does($spec); |
235 | }; |
236 | $type = 'Role'; |
237 | } |
238 | else{ |
239 | $check = sub{ |
240 | return blessed($_[0]) && $_[0]->isa($spec); |
241 | }; |
242 | $type = 'Class'; |
243 | } |
244 | |
f5ee065f |
245 | return $TYPE{$spec} = Mouse::Meta::TypeConstraint->new( |
3b89ea91 |
246 | name => $spec, |
247 | optimized => $check, |
f5ee065f |
248 | |
3b89ea91 |
249 | type => $type, |
d44f0d03 |
250 | ); |
251 | } |
252 | |
f5ee065f |
253 | $TYPE{ArrayRef}{constraint_generator} = sub { |
254 | my($type_parameter) = @_; |
3b89ea91 |
255 | my $check = $type_parameter->_compiled_type_constraint; |
321e5271 |
256 | |
f5ee065f |
257 | return sub{ |
258 | foreach my $value (@{$_}) { |
259 | return undef unless $check->($value); |
260 | } |
261 | return 1; |
262 | } |
263 | }; |
264 | $TYPE{HashRef}{constraint_generator} = sub { |
265 | my($type_parameter) = @_; |
3b89ea91 |
266 | my $check = $type_parameter->_compiled_type_constraint; |
f5ee065f |
267 | |
268 | return sub{ |
269 | foreach my $value(values %{$_}){ |
270 | return undef unless $check->($value); |
271 | } |
272 | return 1; |
273 | }; |
274 | }; |
2efc0af1 |
275 | |
f5ee065f |
276 | # 'Maybe' type accepts 'Any', so it requires parameters |
277 | $TYPE{Maybe}{constraint_generator} = sub { |
278 | my($type_parameter) = @_; |
3b89ea91 |
279 | my $check = $type_parameter->_compiled_type_constraint; |
2efc0af1 |
280 | |
f5ee065f |
281 | return sub{ |
282 | return !defined($_) || $check->($_); |
283 | }; |
284 | }; |
285 | |
286 | sub _find_or_create_parameterized_type{ |
287 | my($base, $param) = @_; |
288 | |
289 | my $name = sprintf '%s[%s]', $base->name, $param->name; |
290 | |
291 | $TYPE{$name} ||= do{ |
f5ee065f |
292 | my $generator = $base->{constraint_generator}; |
293 | |
294 | if(!$generator){ |
295 | confess("The $name constraint cannot be used, because $param doesn't subtype from a parameterizable type"); |
2efc0af1 |
296 | } |
f5ee065f |
297 | |
298 | Mouse::Meta::TypeConstraint->new( |
299 | name => $name, |
300 | parent => $base, |
301 | constraint => $generator->($param), |
302 | |
303 | type => 'Parameterized', |
304 | ); |
305 | } |
306 | } |
307 | sub _find_or_create_union_type{ |
57f0e313 |
308 | my @types = map{ $_->{type_constraints} ? @{$_->{type_constraints}} : $_ } @_; |
f5ee065f |
309 | |
310 | my $name = join '|', map{ $_->name } @types; |
311 | |
312 | $TYPE{$name} ||= do{ |
f5ee065f |
313 | return Mouse::Meta::TypeConstraint->new( |
3b89ea91 |
314 | name => $name, |
315 | type_constraints => \@types, |
f5ee065f |
316 | |
3b89ea91 |
317 | type => 'Union', |
f5ee065f |
318 | ); |
319 | }; |
320 | } |
321 | |
322 | # The type parser |
323 | sub _parse_type{ |
324 | my($spec, $start) = @_; |
325 | |
326 | my @list; |
327 | my $subtype; |
328 | |
329 | my $len = length $spec; |
330 | my $i; |
331 | |
332 | for($i = $start; $i < $len; $i++){ |
333 | my $char = substr($spec, $i, 1); |
334 | |
335 | if($char eq '['){ |
57f0e313 |
336 | my $base = _find_or_create_regular_type( substr($spec, $start, $i - $start) ) |
f5ee065f |
337 | or return; |
338 | |
339 | ($i, $subtype) = _parse_type($spec, $i+1) |
340 | or return; |
341 | $start = $i+1; # reset |
342 | |
343 | push @list, _find_or_create_parameterized_type($base => $subtype); |
321e5271 |
344 | } |
f5ee065f |
345 | elsif($char eq ']'){ |
346 | $len = $i+1; |
347 | last; |
321e5271 |
348 | } |
f5ee065f |
349 | elsif($char eq '|'){ |
57f0e313 |
350 | my $type = _find_or_create_regular_type( substr($spec, $start, $i - $start) ); |
351 | |
57f0e313 |
352 | if(!defined $type){ |
3b89ea91 |
353 | # XXX: Mouse creates a new class type, but Moose does not. |
354 | $type = class_type( substr($spec, $start, $i - $start) ); |
57f0e313 |
355 | } |
f5ee065f |
356 | |
357 | push @list, $type; |
358 | |
359 | ($i, $subtype) = _parse_type($spec, $i+1) |
360 | or return; |
361 | |
362 | $start = $i+1; # reset |
363 | |
364 | push @list, $subtype; |
321e5271 |
365 | } |
366 | } |
f5ee065f |
367 | if($i - $start){ |
368 | push @list, _find_or_create_regular_type(substr $spec, $start, $i - $start); |
369 | } |
321e5271 |
370 | |
f5ee065f |
371 | if(@list == 0){ |
372 | return; |
373 | } |
374 | elsif(@list == 1){ |
375 | return ($len, $list[0]); |
993e62a7 |
376 | } |
377 | else{ |
f5ee065f |
378 | return ($len, _find_or_create_union_type(@list)); |
993e62a7 |
379 | } |
321e5271 |
380 | } |
381 | |
f5ee065f |
382 | |
383 | sub find_type_constraint { |
384 | my($spec) = @_; |
e98220ab |
385 | return $spec if blessed($spec) && $spec->isa('Mouse::Meta::TypeConstraint'); |
f5ee065f |
386 | |
387 | $spec =~ s/\s+//g; |
388 | return $TYPE{$spec}; |
2efc0af1 |
389 | } |
390 | |
f5ee065f |
391 | sub find_or_parse_type_constraint { |
392 | my($spec) = @_; |
e98220ab |
393 | return $spec if blessed($spec) && $spec->isa('Mouse::Meta::TypeConstraint'); |
9c85e9dc |
394 | |
f5ee065f |
395 | $spec =~ s/\s+//g; |
396 | return $TYPE{$spec} || do{ |
397 | my($pos, $type) = _parse_type($spec, 0); |
398 | $type; |
399 | }; |
400 | } |
321e5271 |
401 | |
f5ee065f |
402 | sub find_or_create_does_type_constraint{ |
403 | my $type = find_or_parse_type_constriant(@_) || role_type(@_); |
94593ae8 |
404 | |
f5ee065f |
405 | if($type->{type} && $type->{type} ne 'Role'){ |
406 | Carp::cluck("$type is not a role type"); |
321e5271 |
407 | } |
f5ee065f |
408 | return $type; |
409 | } |
410 | |
411 | sub find_or_create_isa_type_constraint { |
412 | return find_or_parse_type_constraint(@_) || class_type(@_); |
321e5271 |
413 | } |
414 | |
d60c78b9 |
415 | 1; |
416 | |
6feb83f1 |
417 | __END__ |
418 | |
419 | =head1 NAME |
420 | |
5893ee36 |
421 | Mouse::Util::TypeConstraints - Type constraint system for Mouse |
422 | |
423 | =head2 SYNOPSIS |
424 | |
425 | use Mouse::Util::TypeConstraints; |
426 | |
427 | subtype 'Natural' |
428 | => as 'Int' |
429 | => where { $_ > 0 }; |
430 | |
431 | subtype 'NaturalLessThanTen' |
432 | => as 'Natural' |
433 | => where { $_ < 10 } |
434 | => message { "This number ($_) is not less than ten!" }; |
435 | |
436 | coerce 'Num' |
437 | => from 'Str' |
438 | => via { 0+$_ }; |
439 | |
440 | enum 'RGBColors' => qw(red green blue); |
441 | |
442 | no Mouse::Util::TypeConstraints; |
443 | |
444 | =head1 DESCRIPTION |
445 | |
446 | This module provides Mouse with the ability to create custom type |
447 | constraints to be used in attribute definition. |
448 | |
449 | =head2 Important Caveat |
450 | |
451 | This is B<NOT> a type system for Perl 5. These are type constraints, |
452 | and they are not used by Mouse unless you tell it to. No type |
453 | inference is performed, expressions are not typed, etc. etc. etc. |
454 | |
455 | A type constraint is at heart a small "check if a value is valid" |
456 | function. A constraint can be associated with an attribute. This |
457 | simplifies parameter validation, and makes your code clearer to read, |
458 | because you can refer to constraints by name. |
459 | |
460 | =head2 Slightly Less Important Caveat |
461 | |
462 | It is B<always> a good idea to quote your type names. |
463 | |
464 | This prevents Perl from trying to execute the call as an indirect |
465 | object call. This can be an issue when you have a subtype with the |
466 | same name as a valid class. |
467 | |
468 | For instance: |
469 | |
470 | subtype DateTime => as Object => where { $_->isa('DateTime') }; |
471 | |
472 | will I<just work>, while this: |
473 | |
474 | use DateTime; |
475 | subtype DateTime => as Object => where { $_->isa('DateTime') }; |
476 | |
477 | will fail silently and cause many headaches. The simple way to solve |
478 | this, as well as future proof your subtypes from classes which have |
479 | yet to have been created, is to quote the type name: |
480 | |
481 | use DateTime; |
482 | subtype 'DateTime' => as 'Object' => where { $_->isa('DateTime') }; |
483 | |
484 | =head2 Default Type Constraints |
485 | |
486 | This module also provides a simple hierarchy for Perl 5 types, here is |
487 | that hierarchy represented visually. |
488 | |
489 | Any |
490 | Item |
491 | Bool |
492 | Maybe[`a] |
493 | Undef |
494 | Defined |
495 | Value |
496 | Num |
497 | Int |
498 | Str |
499 | ClassName |
500 | RoleName |
501 | Ref |
502 | ScalarRef |
503 | ArrayRef[`a] |
504 | HashRef[`a] |
505 | CodeRef |
506 | RegexpRef |
507 | GlobRef |
508 | FileHandle |
509 | Object |
5893ee36 |
510 | |
511 | B<NOTE:> Any type followed by a type parameter C<[`a]> can be |
512 | parameterized, this means you can say: |
513 | |
514 | ArrayRef[Int] # an array of integers |
515 | HashRef[CodeRef] # a hash of str to CODE ref mappings |
516 | Maybe[Str] # value may be a string, may be undefined |
517 | |
518 | If Mouse finds a name in brackets that it does not recognize as an |
519 | existing type, it assumes that this is a class name, for example |
520 | C<ArrayRef[DateTime]>. |
521 | |
522 | B<NOTE:> Unless you parameterize a type, then it is invalid to include |
523 | the square brackets. I.e. C<ArrayRef[]> will be treated as a new type |
524 | name, I<not> as a parameterization of C<ArrayRef>. |
525 | |
526 | B<NOTE:> The C<Undef> type constraint for the most part works |
527 | correctly now, but edge cases may still exist, please use it |
528 | sparingly. |
529 | |
530 | B<NOTE:> The C<ClassName> type constraint does a complex package |
531 | existence check. This means that your class B<must> be loaded for this |
532 | type constraint to pass. |
533 | |
534 | B<NOTE:> The C<RoleName> constraint checks a string is a I<package |
535 | name> which is a role, like C<'MyApp::Role::Comparable'>. The C<Role> |
536 | constraint checks that an I<object does> the named role. |
537 | |
538 | =head2 Type Constraint Naming |
539 | |
540 | Type name declared via this module can only contain alphanumeric |
541 | characters, colons (:), and periods (.). |
542 | |
543 | Since the types created by this module are global, it is suggested |
544 | that you namespace your types just as you would namespace your |
545 | modules. So instead of creating a I<Color> type for your |
546 | B<My::Graphics> module, you would call the type |
547 | I<My::Graphics::Types::Color> instead. |
548 | |
549 | =head2 Use with Other Constraint Modules |
550 | |
551 | This module can play nicely with other constraint modules with some |
552 | slight tweaking. The C<where> clause in types is expected to be a |
553 | C<CODE> reference which checks it's first argument and returns a |
554 | boolean. Since most constraint modules work in a similar way, it |
555 | should be simple to adapt them to work with Mouse. |
556 | |
557 | For instance, this is how you could use it with |
558 | L<Declare::Constraints::Simple> to declare a completely new type. |
559 | |
560 | type 'HashOfArrayOfObjects', |
561 | { |
562 | where => IsHashRef( |
563 | -keys => HasLength, |
564 | -values => IsArrayRef(IsObject) |
565 | ) |
566 | }; |
567 | |
568 | Here is an example of using L<Test::Deep> and it's non-test |
569 | related C<eq_deeply> function. |
570 | |
571 | type 'ArrayOfHashOfBarsAndRandomNumbers' |
572 | => where { |
573 | eq_deeply($_, |
574 | array_each(subhashof({ |
575 | bar => isa('Bar'), |
576 | random_number => ignore() |
577 | }))) |
578 | }; |
6feb83f1 |
579 | |
580 | =head1 METHODS |
581 | |
24410e3a |
582 | =head2 C<< list_all_builtin_type_constraints -> (Names) >> |
6feb83f1 |
583 | |
24410e3a |
584 | Returns the names of builtin type constraints. |
585 | |
586 | =head2 C<< list_all_type_constraints -> (Names) >> |
587 | |
588 | Returns the names of all the type constraints. |
6feb83f1 |
589 | |
c91d12e0 |
590 | =head1 FUNCTIONS |
591 | |
592 | =over 4 |
593 | |
1820fffe |
594 | =item C<< subtype 'Name' => as 'Parent' => where { } ... -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
595 | |
1820fffe |
596 | =item C<< subtype as 'Parent' => where { } ... -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
597 | |
1820fffe |
598 | =item C<< class_type ($class, ?$options) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
599 | |
1820fffe |
600 | =item C<< role_type ($role, ?$options) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
601 | |
1820fffe |
602 | =item C<< enum (\@values) -> Mouse::Meta::TypeConstraint >> |
603 | |
604 | =back |
605 | |
606 | =over 4 |
607 | |
608 | =item C<< find_type_constraint(Type) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
609 | |
610 | =back |
611 | |
5893ee36 |
612 | =head1 THANKS |
613 | |
1820fffe |
614 | Much of this documentation was taken from C<Moose::Util::TypeConstraints> |
615 | |
616 | =head1 SEE ALSO |
617 | |
618 | L<Moose::Util::TypeConstraints> |
5893ee36 |
619 | |
6feb83f1 |
620 | =cut |
621 | |
622 | |