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); |
684db121 |
11 | use Mouse::Meta::TypeConstraint; |
d60c78b9 |
12 | |
f3bb863f |
13 | our @ISA = qw(Exporter); |
139d92d2 |
14 | our @EXPORT = qw( |
d44f0d03 |
15 | as where message from via type subtype coerce class_type role_type enum |
ccf44227 |
16 | find_type_constraint |
139d92d2 |
17 | ); |
18 | |
cceb0e25 |
19 | my %TYPE; |
8a7f2a8a |
20 | my %COERCE; |
21 | my %COERCE_KEYS; |
4188b837 |
22 | |
139d92d2 |
23 | sub as ($) { |
cd2b9201 |
24 | return(as => $_[0]); |
61a02a3a |
25 | } |
139d92d2 |
26 | sub where (&) { |
cd2b9201 |
27 | return(where => $_[0]) |
61a02a3a |
28 | } |
0f1dae9a |
29 | sub message (&) { |
cd2b9201 |
30 | return(message => $_[0]) |
61a02a3a |
31 | } |
32 | |
73766a27 |
33 | sub from { @_ } |
cd2b9201 |
34 | sub via (&) { $_[0] } |
61a02a3a |
35 | |
321e5271 |
36 | BEGIN { |
993e62a7 |
37 | my %builtins = ( |
f5ee065f |
38 | Any => undef, # null check |
39 | Item => undef, # null check |
40 | Maybe => undef, # null check |
73766a27 |
41 | |
42 | Bool => sub { $_[0] ? $_[0] eq '1' : 1 }, |
c91d12e0 |
43 | Undef => sub { !defined($_[0]) }, |
44 | Defined => sub { defined($_[0]) }, |
45 | Value => sub { defined($_[0]) && !ref($_[0]) }, |
46 | Num => sub { !ref($_[0]) && looks_like_number($_[0]) }, |
47 | Int => sub { defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ }, |
48 | Str => sub { defined($_[0]) && !ref($_[0]) }, |
c91d12e0 |
49 | Ref => sub { ref($_[0]) }, |
50 | |
51 | ScalarRef => sub { ref($_[0]) eq 'SCALAR' }, |
52 | ArrayRef => sub { ref($_[0]) eq 'ARRAY' }, |
53 | HashRef => sub { ref($_[0]) eq 'HASH' }, |
54 | CodeRef => sub { ref($_[0]) eq 'CODE' }, |
55 | RegexpRef => sub { ref($_[0]) eq 'Regexp' }, |
56 | GlobRef => sub { ref($_[0]) eq 'GLOB' }, |
381f326a |
57 | |
58 | FileHandle => sub { |
c91d12e0 |
59 | ref($_[0]) eq 'GLOB' && openhandle($_[0]) |
381f326a |
60 | or |
c91d12e0 |
61 | blessed($_[0]) && $_[0]->isa("IO::Handle") |
abe4e887 |
62 | }, |
381f326a |
63 | |
c91d12e0 |
64 | Object => sub { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }, |
73766a27 |
65 | |
66 | ClassName => sub { Mouse::Util::is_class_loaded($_[0]) }, |
d4571def |
67 | RoleName => sub { (Mouse::Util::find_meta($_[0]) || return 0)->isa('Mouse::Meta::Role') }, |
8a7f2a8a |
68 | ); |
993e62a7 |
69 | |
70 | while (my ($name, $code) = each %builtins) { |
73766a27 |
71 | $TYPE{$name} = Mouse::Meta::TypeConstraint->new( |
3b89ea91 |
72 | name => $name, |
73 | optimized => $code, |
73766a27 |
74 | ); |
78b13827 |
75 | } |
d3982c7e |
76 | |
deb9a0f3 |
77 | sub optimized_constraints { # DEPRECATED |
f5ee065f |
78 | Carp::cluck('optimized_constraints() has been deprecated'); |
79 | return \%TYPE; |
80 | } |
d4571def |
81 | |
993e62a7 |
82 | my @builtins = keys %TYPE; |
83 | sub list_all_builtin_type_constraints { @builtins } |
84 | |
85 | sub list_all_type_constraints { keys %TYPE } |
381f326a |
86 | } |
d3982c7e |
87 | |
f5ee065f |
88 | sub _create_type{ |
89 | my $mode = shift; |
90 | |
73766a27 |
91 | my $name; |
f5ee065f |
92 | my %args; |
73766a27 |
93 | |
f5ee065f |
94 | if(@_ == 1 && ref $_[0]){ # @_ : { name => $name, where => ... } |
95 | %args = %{$_[0]}; |
73766a27 |
96 | } |
f5ee065f |
97 | elsif(@_ == 2 && ref $_[1]){ # @_ : $name => { where => ... } |
73766a27 |
98 | $name = $_[0]; |
f5ee065f |
99 | %args = %{$_[1]}; |
73766a27 |
100 | } |
f5ee065f |
101 | elsif(@_ % 2){ # @_ : $name => ( where => ... ) |
102 | ($name, %args) = @_; |
73766a27 |
103 | } |
f5ee065f |
104 | else{ # @_ : (name => $name, where => ...) |
105 | %args = @_; |
73766a27 |
106 | } |
107 | |
f5ee065f |
108 | if(!defined $name){ |
109 | if(!defined($name = $args{name})){ |
110 | $name = '__ANON__'; |
111 | } |
cd2b9201 |
112 | } |
d4571def |
113 | |
f5ee065f |
114 | $args{name} = $name; |
7dbebb1b |
115 | |
f5ee065f |
116 | my $package_defined_in = $args{package_defined_in} ||= caller(1); |
d4571def |
117 | |
f5ee065f |
118 | my $existing = $TYPE{$name}; |
119 | if($existing && $existing->{package_defined_in} ne $package_defined_in){ |
120 | confess("The type constraint '$name' has already been created in " |
121 | . "$existing->{package_defined_in} and cannot be created again in $package_defined_in"); |
122 | } |
d4571def |
123 | |
24410e3a |
124 | $args{constraint} = delete($args{where}) if exists $args{where}; |
125 | $args{optimized} = delete $args{optimized_as} if exists $args{optimized_as}; |
0d9fea22 |
126 | |
f5ee065f |
127 | my $constraint; |
128 | if($mode eq 'subtype'){ |
24410e3a |
129 | my $parent = delete($args{as}) |
130 | or confess('A subtype cannot consist solely of a name, it must have a parent'); |
7a50b450 |
131 | |
24410e3a |
132 | $constraint = find_or_create_isa_type_constraint($parent)->create_child_type(%args); |
7a50b450 |
133 | } |
134 | else{ |
f5ee065f |
135 | $constraint = Mouse::Meta::TypeConstraint->new(%args); |
73766a27 |
136 | } |
7dbebb1b |
137 | |
f5ee065f |
138 | return $TYPE{$name} = $constraint; |
139 | } |
7dbebb1b |
140 | |
f5ee065f |
141 | sub type { |
142 | return _create_type('type', @_); |
143 | } |
d4571def |
144 | |
f5ee065f |
145 | sub subtype { |
146 | return _create_type('subtype', @_); |
4188b837 |
147 | } |
148 | |
139d92d2 |
149 | sub coerce { |
ffbbf459 |
150 | my $type_name = shift; |
61a02a3a |
151 | |
ffbbf459 |
152 | my $type = find_type_constraint($type_name) |
153 | or confess("Cannot find type '$type_name', perhaps you forgot to load it."); |
61a02a3a |
154 | |
ffbbf459 |
155 | $type->_add_type_coercions(@_); |
cd2b9201 |
156 | return; |
4188b837 |
157 | } |
158 | |
139d92d2 |
159 | sub class_type { |
ecc6e3b1 |
160 | my($name, $conf) = @_; |
d9f8c878 |
161 | if ($conf && $conf->{class}) { |
162 | # No, you're using this wrong |
163 | warn "class_type() should be class_type(ClassName). Perhaps you're looking for subtype $name => as '$conf->{class}'?"; |
f5ee065f |
164 | _create_type 'type', $name => ( |
165 | as => $conf->{class}, |
166 | |
167 | type => 'Class', |
168 | ); |
a497c7d3 |
169 | } |
170 | else { |
f5ee065f |
171 | _create_type 'type', $name => ( |
172 | optimized_as => sub { blessed($_[0]) && $_[0]->isa($name) }, |
173 | |
174 | type => 'Class', |
d9f8c878 |
175 | ); |
176 | } |
ecc6e3b1 |
177 | } |
178 | |
139d92d2 |
179 | sub role_type { |
47f36c05 |
180 | my($name, $conf) = @_; |
f5ee065f |
181 | my $role = ($conf && $conf->{role}) ? $conf->{role} : $name; |
182 | _create_type 'type', $name => ( |
183 | optimized_as => sub { blessed($_[0]) && does_role($_[0], $role) }, |
184 | |
185 | type => 'Role', |
61a02a3a |
186 | ); |
47f36c05 |
187 | } |
188 | |
deb9a0f3 |
189 | sub typecast_constraints { # DEPRECATED |
ffbbf459 |
190 | my($class, $pkg, $type, $value) = @_; |
2efc0af1 |
191 | Carp::croak("wrong arguments count") unless @_ == 4; |
eec1bb49 |
192 | |
e763d56e |
193 | Carp::cluck("typecast_constraints() has been deprecated, which was an internal utility anyway"); |
194 | |
ffbbf459 |
195 | return $type->coerce($value); |
4188b837 |
196 | } |
197 | |
d44f0d03 |
198 | sub enum { |
f5ee065f |
199 | my($name, %valid); |
200 | |
01904723 |
201 | # enum ['small', 'medium', 'large'] |
202 | if (ref($_[0]) eq 'ARRAY') { |
f5ee065f |
203 | %valid = map{ $_ => undef } @{ $_[0] }; |
204 | $name = sprintf '(%s)', join '|', sort @{$_[0]}; |
205 | } |
206 | # enum size => 'small', 'medium', 'large' |
207 | else{ |
208 | $name = shift; |
209 | %valid = map{ $_ => undef } @_; |
210 | } |
211 | return _create_type 'type', $name => ( |
212 | optimized_as => sub{ defined($_[0]) && !ref($_[0]) && exists $valid{$_[0]} }, |
213 | |
214 | type => 'Enum', |
215 | ); |
216 | } |
217 | |
218 | sub _find_or_create_regular_type{ |
219 | my($spec) = @_; |
220 | |
221 | return $TYPE{$spec} if exists $TYPE{$spec}; |
01904723 |
222 | |
7727a2f0 |
223 | my $meta = Mouse::Util::get_metaclass_by_name($spec); |
f5ee065f |
224 | |
225 | if(!$meta){ |
226 | return; |
01904723 |
227 | } |
228 | |
f5ee065f |
229 | my $check; |
230 | my $type; |
57f0e313 |
231 | if($meta->isa('Mouse::Meta::Role')){ |
f5ee065f |
232 | $check = sub{ |
233 | return blessed($_[0]) && $_[0]->does($spec); |
234 | }; |
235 | $type = 'Role'; |
236 | } |
237 | else{ |
238 | $check = sub{ |
239 | return blessed($_[0]) && $_[0]->isa($spec); |
240 | }; |
241 | $type = 'Class'; |
242 | } |
243 | |
f5ee065f |
244 | return $TYPE{$spec} = Mouse::Meta::TypeConstraint->new( |
3b89ea91 |
245 | name => $spec, |
246 | optimized => $check, |
f5ee065f |
247 | |
3b89ea91 |
248 | type => $type, |
d44f0d03 |
249 | ); |
250 | } |
251 | |
f5ee065f |
252 | $TYPE{ArrayRef}{constraint_generator} = sub { |
253 | my($type_parameter) = @_; |
3b89ea91 |
254 | my $check = $type_parameter->_compiled_type_constraint; |
321e5271 |
255 | |
f5ee065f |
256 | return sub{ |
257 | foreach my $value (@{$_}) { |
258 | return undef unless $check->($value); |
259 | } |
260 | return 1; |
261 | } |
262 | }; |
263 | $TYPE{HashRef}{constraint_generator} = sub { |
264 | my($type_parameter) = @_; |
3b89ea91 |
265 | my $check = $type_parameter->_compiled_type_constraint; |
f5ee065f |
266 | |
267 | return sub{ |
268 | foreach my $value(values %{$_}){ |
269 | return undef unless $check->($value); |
270 | } |
271 | return 1; |
272 | }; |
273 | }; |
2efc0af1 |
274 | |
f5ee065f |
275 | # 'Maybe' type accepts 'Any', so it requires parameters |
276 | $TYPE{Maybe}{constraint_generator} = sub { |
277 | my($type_parameter) = @_; |
3b89ea91 |
278 | my $check = $type_parameter->_compiled_type_constraint; |
2efc0af1 |
279 | |
f5ee065f |
280 | return sub{ |
281 | return !defined($_) || $check->($_); |
282 | }; |
283 | }; |
284 | |
285 | sub _find_or_create_parameterized_type{ |
286 | my($base, $param) = @_; |
287 | |
288 | my $name = sprintf '%s[%s]', $base->name, $param->name; |
289 | |
290 | $TYPE{$name} ||= do{ |
f5ee065f |
291 | my $generator = $base->{constraint_generator}; |
292 | |
293 | if(!$generator){ |
294 | confess("The $name constraint cannot be used, because $param doesn't subtype from a parameterizable type"); |
2efc0af1 |
295 | } |
f5ee065f |
296 | |
297 | Mouse::Meta::TypeConstraint->new( |
298 | name => $name, |
299 | parent => $base, |
300 | constraint => $generator->($param), |
301 | |
302 | type => 'Parameterized', |
303 | ); |
304 | } |
305 | } |
306 | sub _find_or_create_union_type{ |
57f0e313 |
307 | my @types = map{ $_->{type_constraints} ? @{$_->{type_constraints}} : $_ } @_; |
f5ee065f |
308 | |
309 | my $name = join '|', map{ $_->name } @types; |
310 | |
311 | $TYPE{$name} ||= do{ |
f5ee065f |
312 | return Mouse::Meta::TypeConstraint->new( |
3b89ea91 |
313 | name => $name, |
314 | type_constraints => \@types, |
f5ee065f |
315 | |
3b89ea91 |
316 | type => 'Union', |
f5ee065f |
317 | ); |
318 | }; |
319 | } |
320 | |
321 | # The type parser |
322 | sub _parse_type{ |
323 | my($spec, $start) = @_; |
324 | |
325 | my @list; |
326 | my $subtype; |
327 | |
328 | my $len = length $spec; |
329 | my $i; |
330 | |
331 | for($i = $start; $i < $len; $i++){ |
332 | my $char = substr($spec, $i, 1); |
333 | |
334 | if($char eq '['){ |
57f0e313 |
335 | my $base = _find_or_create_regular_type( substr($spec, $start, $i - $start) ) |
f5ee065f |
336 | or return; |
337 | |
338 | ($i, $subtype) = _parse_type($spec, $i+1) |
339 | or return; |
340 | $start = $i+1; # reset |
341 | |
342 | push @list, _find_or_create_parameterized_type($base => $subtype); |
321e5271 |
343 | } |
f5ee065f |
344 | elsif($char eq ']'){ |
345 | $len = $i+1; |
346 | last; |
321e5271 |
347 | } |
f5ee065f |
348 | elsif($char eq '|'){ |
57f0e313 |
349 | my $type = _find_or_create_regular_type( substr($spec, $start, $i - $start) ); |
350 | |
57f0e313 |
351 | if(!defined $type){ |
3b89ea91 |
352 | # XXX: Mouse creates a new class type, but Moose does not. |
353 | $type = class_type( substr($spec, $start, $i - $start) ); |
57f0e313 |
354 | } |
f5ee065f |
355 | |
356 | push @list, $type; |
357 | |
358 | ($i, $subtype) = _parse_type($spec, $i+1) |
359 | or return; |
360 | |
361 | $start = $i+1; # reset |
362 | |
363 | push @list, $subtype; |
321e5271 |
364 | } |
365 | } |
f5ee065f |
366 | if($i - $start){ |
367 | push @list, _find_or_create_regular_type(substr $spec, $start, $i - $start); |
368 | } |
321e5271 |
369 | |
f5ee065f |
370 | if(@list == 0){ |
371 | return; |
372 | } |
373 | elsif(@list == 1){ |
374 | return ($len, $list[0]); |
993e62a7 |
375 | } |
376 | else{ |
f5ee065f |
377 | return ($len, _find_or_create_union_type(@list)); |
993e62a7 |
378 | } |
321e5271 |
379 | } |
380 | |
f5ee065f |
381 | |
382 | sub find_type_constraint { |
383 | my($spec) = @_; |
e98220ab |
384 | return $spec if blessed($spec) && $spec->isa('Mouse::Meta::TypeConstraint'); |
f5ee065f |
385 | |
386 | $spec =~ s/\s+//g; |
387 | return $TYPE{$spec}; |
2efc0af1 |
388 | } |
389 | |
f5ee065f |
390 | sub find_or_parse_type_constraint { |
391 | my($spec) = @_; |
e98220ab |
392 | return $spec if blessed($spec) && $spec->isa('Mouse::Meta::TypeConstraint'); |
9c85e9dc |
393 | |
f5ee065f |
394 | $spec =~ s/\s+//g; |
395 | return $TYPE{$spec} || do{ |
396 | my($pos, $type) = _parse_type($spec, 0); |
397 | $type; |
398 | }; |
399 | } |
321e5271 |
400 | |
f5ee065f |
401 | sub find_or_create_does_type_constraint{ |
402 | my $type = find_or_parse_type_constriant(@_) || role_type(@_); |
94593ae8 |
403 | |
f5ee065f |
404 | if($type->{type} && $type->{type} ne 'Role'){ |
405 | Carp::cluck("$type is not a role type"); |
321e5271 |
406 | } |
f5ee065f |
407 | return $type; |
408 | } |
409 | |
410 | sub find_or_create_isa_type_constraint { |
411 | return find_or_parse_type_constraint(@_) || class_type(@_); |
321e5271 |
412 | } |
413 | |
d60c78b9 |
414 | 1; |
415 | |
6feb83f1 |
416 | __END__ |
417 | |
418 | =head1 NAME |
419 | |
5893ee36 |
420 | Mouse::Util::TypeConstraints - Type constraint system for Mouse |
421 | |
422 | =head2 SYNOPSIS |
423 | |
424 | use Mouse::Util::TypeConstraints; |
425 | |
426 | subtype 'Natural' |
427 | => as 'Int' |
428 | => where { $_ > 0 }; |
429 | |
430 | subtype 'NaturalLessThanTen' |
431 | => as 'Natural' |
432 | => where { $_ < 10 } |
433 | => message { "This number ($_) is not less than ten!" }; |
434 | |
435 | coerce 'Num' |
436 | => from 'Str' |
437 | => via { 0+$_ }; |
438 | |
439 | enum 'RGBColors' => qw(red green blue); |
440 | |
441 | no Mouse::Util::TypeConstraints; |
442 | |
443 | =head1 DESCRIPTION |
444 | |
445 | This module provides Mouse with the ability to create custom type |
446 | constraints to be used in attribute definition. |
447 | |
448 | =head2 Important Caveat |
449 | |
450 | This is B<NOT> a type system for Perl 5. These are type constraints, |
451 | and they are not used by Mouse unless you tell it to. No type |
452 | inference is performed, expressions are not typed, etc. etc. etc. |
453 | |
454 | A type constraint is at heart a small "check if a value is valid" |
455 | function. A constraint can be associated with an attribute. This |
456 | simplifies parameter validation, and makes your code clearer to read, |
457 | because you can refer to constraints by name. |
458 | |
459 | =head2 Slightly Less Important Caveat |
460 | |
461 | It is B<always> a good idea to quote your type names. |
462 | |
463 | This prevents Perl from trying to execute the call as an indirect |
464 | object call. This can be an issue when you have a subtype with the |
465 | same name as a valid class. |
466 | |
467 | For instance: |
468 | |
469 | subtype DateTime => as Object => where { $_->isa('DateTime') }; |
470 | |
471 | will I<just work>, while this: |
472 | |
473 | use DateTime; |
474 | subtype DateTime => as Object => where { $_->isa('DateTime') }; |
475 | |
476 | will fail silently and cause many headaches. The simple way to solve |
477 | this, as well as future proof your subtypes from classes which have |
478 | yet to have been created, is to quote the type name: |
479 | |
480 | use DateTime; |
481 | subtype 'DateTime' => as 'Object' => where { $_->isa('DateTime') }; |
482 | |
483 | =head2 Default Type Constraints |
484 | |
485 | This module also provides a simple hierarchy for Perl 5 types, here is |
486 | that hierarchy represented visually. |
487 | |
488 | Any |
489 | Item |
490 | Bool |
491 | Maybe[`a] |
492 | Undef |
493 | Defined |
494 | Value |
495 | Num |
496 | Int |
497 | Str |
498 | ClassName |
499 | RoleName |
500 | Ref |
501 | ScalarRef |
502 | ArrayRef[`a] |
503 | HashRef[`a] |
504 | CodeRef |
505 | RegexpRef |
506 | GlobRef |
507 | FileHandle |
508 | Object |
5893ee36 |
509 | |
510 | B<NOTE:> Any type followed by a type parameter C<[`a]> can be |
511 | parameterized, this means you can say: |
512 | |
513 | ArrayRef[Int] # an array of integers |
514 | HashRef[CodeRef] # a hash of str to CODE ref mappings |
515 | Maybe[Str] # value may be a string, may be undefined |
516 | |
517 | If Mouse finds a name in brackets that it does not recognize as an |
518 | existing type, it assumes that this is a class name, for example |
519 | C<ArrayRef[DateTime]>. |
520 | |
521 | B<NOTE:> Unless you parameterize a type, then it is invalid to include |
522 | the square brackets. I.e. C<ArrayRef[]> will be treated as a new type |
523 | name, I<not> as a parameterization of C<ArrayRef>. |
524 | |
525 | B<NOTE:> The C<Undef> type constraint for the most part works |
526 | correctly now, but edge cases may still exist, please use it |
527 | sparingly. |
528 | |
529 | B<NOTE:> The C<ClassName> type constraint does a complex package |
530 | existence check. This means that your class B<must> be loaded for this |
531 | type constraint to pass. |
532 | |
533 | B<NOTE:> The C<RoleName> constraint checks a string is a I<package |
534 | name> which is a role, like C<'MyApp::Role::Comparable'>. The C<Role> |
535 | constraint checks that an I<object does> the named role. |
536 | |
537 | =head2 Type Constraint Naming |
538 | |
539 | Type name declared via this module can only contain alphanumeric |
540 | characters, colons (:), and periods (.). |
541 | |
542 | Since the types created by this module are global, it is suggested |
543 | that you namespace your types just as you would namespace your |
544 | modules. So instead of creating a I<Color> type for your |
545 | B<My::Graphics> module, you would call the type |
546 | I<My::Graphics::Types::Color> instead. |
547 | |
548 | =head2 Use with Other Constraint Modules |
549 | |
550 | This module can play nicely with other constraint modules with some |
551 | slight tweaking. The C<where> clause in types is expected to be a |
552 | C<CODE> reference which checks it's first argument and returns a |
553 | boolean. Since most constraint modules work in a similar way, it |
554 | should be simple to adapt them to work with Mouse. |
555 | |
556 | For instance, this is how you could use it with |
557 | L<Declare::Constraints::Simple> to declare a completely new type. |
558 | |
559 | type 'HashOfArrayOfObjects', |
560 | { |
561 | where => IsHashRef( |
562 | -keys => HasLength, |
563 | -values => IsArrayRef(IsObject) |
564 | ) |
565 | }; |
566 | |
567 | Here is an example of using L<Test::Deep> and it's non-test |
568 | related C<eq_deeply> function. |
569 | |
570 | type 'ArrayOfHashOfBarsAndRandomNumbers' |
571 | => where { |
572 | eq_deeply($_, |
573 | array_each(subhashof({ |
574 | bar => isa('Bar'), |
575 | random_number => ignore() |
576 | }))) |
577 | }; |
6feb83f1 |
578 | |
579 | =head1 METHODS |
580 | |
24410e3a |
581 | =head2 C<< list_all_builtin_type_constraints -> (Names) >> |
6feb83f1 |
582 | |
24410e3a |
583 | Returns the names of builtin type constraints. |
584 | |
585 | =head2 C<< list_all_type_constraints -> (Names) >> |
586 | |
587 | Returns the names of all the type constraints. |
6feb83f1 |
588 | |
c91d12e0 |
589 | =head1 FUNCTIONS |
590 | |
591 | =over 4 |
592 | |
1820fffe |
593 | =item C<< subtype 'Name' => as 'Parent' => where { } ... -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
594 | |
1820fffe |
595 | =item C<< subtype as 'Parent' => where { } ... -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
596 | |
1820fffe |
597 | =item C<< class_type ($class, ?$options) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
598 | |
1820fffe |
599 | =item C<< role_type ($role, ?$options) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
600 | |
1820fffe |
601 | =item C<< enum (\@values) -> Mouse::Meta::TypeConstraint >> |
602 | |
603 | =back |
604 | |
605 | =over 4 |
606 | |
607 | =item C<< find_type_constraint(Type) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
608 | |
609 | =back |
610 | |
5893ee36 |
611 | =head1 THANKS |
612 | |
1820fffe |
613 | Much of this documentation was taken from C<Moose::Util::TypeConstraints> |
614 | |
615 | =head1 SEE ALSO |
616 | |
617 | L<Moose::Util::TypeConstraints> |
5893ee36 |
618 | |
6feb83f1 |
619 | =cut |
620 | |
621 | |