Commit | Line | Data |
3b46bd49 |
1 | package Mouse::Util::TypeConstraints; |
bc69ee88 |
2 | use Mouse::Util qw(does_role not_supported); # enables strict and warnings |
9baf5d6b |
3 | |
718b5d9b |
4 | use Carp (); |
b7d1f970 |
5 | use Scalar::Util (); |
6d28c5cf |
6 | |
684db121 |
7 | use Mouse::Meta::TypeConstraint; |
bc69ee88 |
8 | use Mouse::Exporter; |
9 | |
10 | Mouse::Exporter->setup_import_methods( |
11 | as_is => [qw( |
5d4810c1 |
12 | as where message optimize_as |
13 | from via |
ebe91068 |
14 | |
15 | type subtype class_type role_type duck_type |
16 | enum |
17 | coerce |
18 | |
bc69ee88 |
19 | find_type_constraint |
20 | )], |
139d92d2 |
21 | ); |
22 | |
718b5d9b |
23 | our @CARP_NOT = qw(Mouse::Meta::Attribute); |
24 | |
cceb0e25 |
25 | my %TYPE; |
4188b837 |
26 | |
df448257 |
27 | # The root type |
28 | $TYPE{Any} = Mouse::Meta::TypeConstraint->new( |
29 | name => 'Any', |
30 | ); |
31 | |
32 | my @builtins = ( |
33 | # $name => $parent, $code, |
34 | |
35 | # the base type |
36 | Item => 'Any', undef, |
37 | |
38 | # the maybe[] type |
39 | Maybe => 'Item', undef, |
40 | |
41 | # value types |
42 | Undef => 'Item', \&Undef, |
43 | Defined => 'Item', \&Defined, |
44 | Bool => 'Item', \&Bool, |
45 | Value => 'Defined', \&Value, |
46 | Str => 'Value', \&Str, |
47 | Num => 'Str', \&Num, |
48 | Int => 'Num', \&Int, |
49 | |
50 | # ref types |
51 | Ref => 'Defined', \&Ref, |
52 | ScalarRef => 'Ref', \&ScalarRef, |
53 | ArrayRef => 'Ref', \&ArrayRef, |
54 | HashRef => 'Ref', \&HashRef, |
55 | CodeRef => 'Ref', \&CodeRef, |
56 | RegexpRef => 'Ref', \&RegexpRef, |
57 | GlobRef => 'Ref', \&GlobRef, |
58 | |
59 | # object types |
60 | FileHandle => 'GlobRef', \&FileHandle, |
61 | Object => 'Ref', \&Object, |
62 | |
63 | # special string types |
64 | ClassName => 'Str', \&ClassName, |
65 | RoleName => 'ClassName', \&RoleName, |
66 | ); |
67 | |
68 | |
69 | while (my ($name, $parent, $code) = splice @builtins, 0, 3) { |
70 | $TYPE{$name} = Mouse::Meta::TypeConstraint->new( |
71 | name => $name, |
72 | parent => $TYPE{$parent}, |
73 | optimized => $code, |
74 | ); |
75 | } |
76 | |
77 | # make it parametarizable |
78 | |
79 | $TYPE{Maybe} {constraint_generator} = \&_parameterize_Maybe_for; |
80 | $TYPE{ArrayRef}{constraint_generator} = \&_parameterize_ArrayRef_for; |
81 | $TYPE{HashRef} {constraint_generator} = \&_parameterize_HashRef_for; |
82 | |
83 | # sugars |
84 | |
a4b15169 |
85 | sub as ($) { (as => $_[0]) } ## no critic |
86 | sub where (&) { (where => $_[0]) } ## no critic |
87 | sub message (&) { (message => $_[0]) } ## no critic |
88 | sub optimize_as (&) { (optimize_as => $_[0]) } ## no critic |
61a02a3a |
89 | |
73766a27 |
90 | sub from { @_ } |
a4b15169 |
91 | sub via (&) { $_[0] } ## no critic |
61a02a3a |
92 | |
df448257 |
93 | # type utilities |
993e62a7 |
94 | |
df448257 |
95 | sub optimized_constraints { # DEPRECATED |
96 | Carp::cluck('optimized_constraints() has been deprecated'); |
97 | return \%TYPE; |
98 | } |
d3982c7e |
99 | |
df448257 |
100 | undef @builtins; # free the allocated memory |
101 | @builtins = keys %TYPE; # reuse it |
102 | sub list_all_builtin_type_constraints { @builtins } |
d4571def |
103 | |
df448257 |
104 | sub list_all_type_constraints { keys %TYPE } |
993e62a7 |
105 | |
f5ee065f |
106 | sub _create_type{ |
107 | my $mode = shift; |
108 | |
73766a27 |
109 | my $name; |
f5ee065f |
110 | my %args; |
73766a27 |
111 | |
f5ee065f |
112 | if(@_ == 1 && ref $_[0]){ # @_ : { name => $name, where => ... } |
113 | %args = %{$_[0]}; |
73766a27 |
114 | } |
f5ee065f |
115 | elsif(@_ == 2 && ref $_[1]){ # @_ : $name => { where => ... } |
73766a27 |
116 | $name = $_[0]; |
f5ee065f |
117 | %args = %{$_[1]}; |
73766a27 |
118 | } |
f5ee065f |
119 | elsif(@_ % 2){ # @_ : $name => ( where => ... ) |
120 | ($name, %args) = @_; |
73766a27 |
121 | } |
f5ee065f |
122 | else{ # @_ : (name => $name, where => ...) |
123 | %args = @_; |
73766a27 |
124 | } |
125 | |
f5ee065f |
126 | if(!defined $name){ |
4f24c598 |
127 | $name = $args{name}; |
cd2b9201 |
128 | } |
d4571def |
129 | |
f5ee065f |
130 | $args{name} = $name; |
b8434acc |
131 | my $parent; |
132 | if($mode eq 'subtype'){ |
133 | $parent = delete $args{as}; |
134 | if(!$parent){ |
135 | $parent = delete $args{name}; |
4f24c598 |
136 | $name = undef; |
b8434acc |
137 | } |
138 | } |
7dbebb1b |
139 | |
4f24c598 |
140 | if(defined $name){ |
df448257 |
141 | # set 'package_defined_in' only if it is not a core package |
142 | my $this = $args{package_defined_in}; |
143 | if(!$this){ |
144 | $this = caller(1); |
145 | if($this !~ /\A Mouse \b/xms){ |
146 | $args{package_defined_in} = $this; |
147 | } |
148 | } |
149 | |
150 | if($TYPE{$name}){ |
151 | my $that = $TYPE{$name}->{package_defined_in} || __PACKAGE__; |
718b5d9b |
152 | ($this eq $that) or Carp::croak( |
df448257 |
153 | "The type constraint '$name' has already been created in $that and cannot be created again in $this" |
154 | ); |
4f24c598 |
155 | } |
156 | } |
157 | else{ |
158 | $args{name} = '__ANON__'; |
f5ee065f |
159 | } |
d4571def |
160 | |
b8434acc |
161 | $args{constraint} = delete $args{where} if exists $args{where}; |
24410e3a |
162 | $args{optimized} = delete $args{optimized_as} if exists $args{optimized_as}; |
0d9fea22 |
163 | |
f5ee065f |
164 | my $constraint; |
165 | if($mode eq 'subtype'){ |
24410e3a |
166 | $constraint = find_or_create_isa_type_constraint($parent)->create_child_type(%args); |
7a50b450 |
167 | } |
168 | else{ |
f5ee065f |
169 | $constraint = Mouse::Meta::TypeConstraint->new(%args); |
73766a27 |
170 | } |
7dbebb1b |
171 | |
4f24c598 |
172 | if(defined $name){ |
173 | return $TYPE{$name} = $constraint; |
174 | } |
175 | else{ |
176 | return $constraint; |
177 | } |
f5ee065f |
178 | } |
7dbebb1b |
179 | |
f5ee065f |
180 | sub type { |
181 | return _create_type('type', @_); |
182 | } |
d4571def |
183 | |
f5ee065f |
184 | sub subtype { |
185 | return _create_type('subtype', @_); |
4188b837 |
186 | } |
187 | |
139d92d2 |
188 | sub coerce { |
ffbbf459 |
189 | my $type_name = shift; |
61a02a3a |
190 | |
ffbbf459 |
191 | my $type = find_type_constraint($type_name) |
718b5d9b |
192 | or Carp::croak("Cannot find type '$type_name', perhaps you forgot to load it."); |
61a02a3a |
193 | |
ffbbf459 |
194 | $type->_add_type_coercions(@_); |
cd2b9201 |
195 | return; |
4188b837 |
196 | } |
197 | |
139d92d2 |
198 | sub class_type { |
337e3b0c |
199 | my($name, $options) = @_; |
200 | my $class = $options->{class} || $name; |
df448257 |
201 | |
202 | # ClassType |
337e3b0c |
203 | return _create_type 'subtype', $name => ( |
ddbad0b1 |
204 | as => 'Object', |
e3540312 |
205 | optimized_as => Mouse::Util::generate_isa_predicate_for($class), |
337e3b0c |
206 | ); |
ecc6e3b1 |
207 | } |
208 | |
139d92d2 |
209 | sub role_type { |
337e3b0c |
210 | my($name, $options) = @_; |
211 | my $role = $options->{role} || $name; |
df448257 |
212 | |
213 | # RoleType |
337e3b0c |
214 | return _create_type 'subtype', $name => ( |
1d5ecd5f |
215 | as => 'Object', |
b7d1f970 |
216 | optimized_as => sub { Scalar::Util::blessed($_[0]) && does_role($_[0], $role) }, |
61a02a3a |
217 | ); |
47f36c05 |
218 | } |
219 | |
ebe91068 |
220 | sub duck_type { |
221 | my($name, @methods); |
222 | |
223 | if(!(@_ == 1 && ref($_[0]) eq 'ARRAY')){ |
224 | $name = shift; |
225 | } |
226 | |
227 | @methods = (@_ == 1 && ref($_[0]) eq 'ARRAY') ? @{$_[0]} : @_; |
228 | |
df448257 |
229 | # DuckType |
188ff28f |
230 | return _create_type 'subtype', $name => ( |
231 | as => 'Object', |
ebe91068 |
232 | optimized_as => Mouse::Util::generate_can_predicate_for(\@methods), |
ebe91068 |
233 | ); |
234 | } |
235 | |
d44f0d03 |
236 | sub enum { |
f5ee065f |
237 | my($name, %valid); |
238 | |
f152b099 |
239 | if(!(@_ == 1 && ref($_[0]) eq 'ARRAY')){ |
240 | $name = shift; |
f5ee065f |
241 | } |
f152b099 |
242 | |
243 | %valid = map{ $_ => undef } (@_ == 1 && ref($_[0]) eq 'ARRAY' ? @{$_[0]} : @_); |
244 | |
df448257 |
245 | # EnumType |
188ff28f |
246 | return _create_type 'subtype', $name => ( |
247 | as => 'Str', |
f5ee065f |
248 | optimized_as => sub{ defined($_[0]) && !ref($_[0]) && exists $valid{$_[0]} }, |
f5ee065f |
249 | ); |
250 | } |
251 | |
252 | sub _find_or_create_regular_type{ |
718b5d9b |
253 | my($spec, $create) = @_; |
f5ee065f |
254 | |
255 | return $TYPE{$spec} if exists $TYPE{$spec}; |
01904723 |
256 | |
718b5d9b |
257 | my $meta = Mouse::Util::get_metaclass_by_name($spec); |
258 | |
259 | if(!defined $meta){ |
260 | return $create ? class_type($spec) : undef; |
261 | } |
01904723 |
262 | |
f48920c1 |
263 | if(Mouse::Util::is_a_metarole($meta)){ |
1d5ecd5f |
264 | return role_type($spec); |
f5ee065f |
265 | } |
266 | else{ |
1d5ecd5f |
267 | return class_type($spec); |
f5ee065f |
268 | } |
d44f0d03 |
269 | } |
270 | |
f5ee065f |
271 | sub _find_or_create_parameterized_type{ |
272 | my($base, $param) = @_; |
273 | |
274 | my $name = sprintf '%s[%s]', $base->name, $param->name; |
275 | |
b4d791ba |
276 | $TYPE{$name} ||= $base->parameterize($param, $name); |
f5ee065f |
277 | } |
b4d791ba |
278 | |
f5ee065f |
279 | sub _find_or_create_union_type{ |
718b5d9b |
280 | return if grep{ not defined } @_; |
a2f1294a |
281 | my @types = sort map{ $_->{type_constraints} ? @{$_->{type_constraints}} : $_ } @_; |
f5ee065f |
282 | |
30b28db3 |
283 | my $name = join '|', @types; |
f5ee065f |
284 | |
df448257 |
285 | # UnionType |
b4d791ba |
286 | $TYPE{$name} ||= Mouse::Meta::TypeConstraint->new( |
287 | name => $name, |
288 | type_constraints => \@types, |
b4d791ba |
289 | ); |
f5ee065f |
290 | } |
291 | |
292 | # The type parser |
f5ee065f |
293 | |
718b5d9b |
294 | # param : '[' type ']' | NOTHING |
295 | sub _parse_param { |
296 | my($c) = @_; |
f5ee065f |
297 | |
718b5d9b |
298 | if($c->{spec} =~ s/^\[//){ |
299 | my $type = _parse_type($c, 1); |
f5ee065f |
300 | |
718b5d9b |
301 | if($c->{spec} =~ s/^\]//){ |
302 | return $type; |
321e5271 |
303 | } |
718b5d9b |
304 | Carp::croak("Syntax error in type: missing right square bracket in '$c->{orig}'"); |
305 | } |
57f0e313 |
306 | |
718b5d9b |
307 | return undef; |
308 | } |
f5ee065f |
309 | |
718b5d9b |
310 | # name : [\w.:]+ |
311 | sub _parse_name { |
312 | my($c, $create) = @_; |
f5ee065f |
313 | |
718b5d9b |
314 | if($c->{spec} =~ s/\A ([\w.:]+) //xms){ |
315 | return _find_or_create_regular_type($1, $create); |
316 | } |
317 | Carp::croak("Syntax error in type: expect type name near '$c->{spec}' in '$c->{orig}'"); |
318 | } |
f5ee065f |
319 | |
718b5d9b |
320 | # single_type : name param |
321 | sub _parse_single_type { |
322 | my($c, $create) = @_; |
f5ee065f |
323 | |
718b5d9b |
324 | my $type = _parse_name($c, $create); |
325 | my $param = _parse_param($c); |
29376895 |
326 | |
718b5d9b |
327 | if(defined $type){ |
328 | if(defined $param){ |
329 | return _find_or_create_parameterized_type($type, $param); |
29376895 |
330 | } |
718b5d9b |
331 | else { |
332 | return $type; |
29376895 |
333 | } |
f5ee065f |
334 | } |
718b5d9b |
335 | elsif(defined $param){ |
336 | Carp::croak("Undefined type with parameter [$param] in '$c->{orig}'"); |
993e62a7 |
337 | } |
338 | else{ |
718b5d9b |
339 | return undef; |
993e62a7 |
340 | } |
321e5271 |
341 | } |
342 | |
718b5d9b |
343 | # type : single_type ('|' single_type)* |
344 | sub _parse_type { |
345 | my($c, $create) = @_; |
346 | |
347 | my $type = _parse_single_type($c, $create); |
348 | if($c->{spec}){ # can be an union type |
349 | my @types; |
350 | while($c->{spec} =~ s/^\|//){ |
351 | push @types, _parse_single_type($c, $create); |
352 | } |
353 | if(@types){ |
354 | return _find_or_create_union_type($type, @types); |
355 | } |
356 | } |
357 | return $type; |
358 | } |
359 | |
f5ee065f |
360 | |
361 | sub find_type_constraint { |
362 | my($spec) = @_; |
f48920c1 |
363 | return $spec if Mouse::Util::is_a_type_constraint($spec); |
df448257 |
364 | return undef if !defined $spec; |
f5ee065f |
365 | |
366 | $spec =~ s/\s+//g; |
367 | return $TYPE{$spec}; |
2efc0af1 |
368 | } |
369 | |
f5ee065f |
370 | sub find_or_parse_type_constraint { |
371 | my($spec) = @_; |
f48920c1 |
372 | return $spec if Mouse::Util::is_a_type_constraint($spec); |
df448257 |
373 | return undef if !defined $spec; |
9c85e9dc |
374 | |
f5ee065f |
375 | $spec =~ s/\s+//g; |
376 | return $TYPE{$spec} || do{ |
718b5d9b |
377 | my $context = { |
378 | spec => $spec, |
379 | orig => $spec, |
380 | }; |
381 | my $type = _parse_type($context); |
382 | |
383 | if($context->{spec}){ |
384 | Carp::croak("Syntax error: extra elements '$context->{spec}' in '$context->{orig}'"); |
385 | } |
f5ee065f |
386 | $type; |
387 | }; |
388 | } |
321e5271 |
389 | |
f5ee065f |
390 | sub find_or_create_does_type_constraint{ |
ddbad0b1 |
391 | # XXX: Moose does not register a new role_type, but Mouse does. |
bddbe49f |
392 | return find_or_parse_type_constraint(@_) || role_type(@_); |
f5ee065f |
393 | } |
394 | |
395 | sub find_or_create_isa_type_constraint { |
ddbad0b1 |
396 | # XXX: Moose does not register a new class_type, but Mouse does. |
f5ee065f |
397 | return find_or_parse_type_constraint(@_) || class_type(@_); |
321e5271 |
398 | } |
399 | |
d60c78b9 |
400 | 1; |
6feb83f1 |
401 | __END__ |
402 | |
403 | =head1 NAME |
404 | |
5893ee36 |
405 | Mouse::Util::TypeConstraints - Type constraint system for Mouse |
406 | |
a25ca8d6 |
407 | =head1 VERSION |
408 | |
1d7d294f |
409 | This document describes Mouse version 0.57 |
a25ca8d6 |
410 | |
5893ee36 |
411 | =head2 SYNOPSIS |
412 | |
413 | use Mouse::Util::TypeConstraints; |
414 | |
415 | subtype 'Natural' |
416 | => as 'Int' |
417 | => where { $_ > 0 }; |
418 | |
419 | subtype 'NaturalLessThanTen' |
420 | => as 'Natural' |
421 | => where { $_ < 10 } |
422 | => message { "This number ($_) is not less than ten!" }; |
423 | |
424 | coerce 'Num' |
425 | => from 'Str' |
426 | => via { 0+$_ }; |
427 | |
428 | enum 'RGBColors' => qw(red green blue); |
429 | |
430 | no Mouse::Util::TypeConstraints; |
431 | |
432 | =head1 DESCRIPTION |
433 | |
434 | This module provides Mouse with the ability to create custom type |
435 | constraints to be used in attribute definition. |
436 | |
437 | =head2 Important Caveat |
438 | |
439 | This is B<NOT> a type system for Perl 5. These are type constraints, |
440 | and they are not used by Mouse unless you tell it to. No type |
441 | inference is performed, expressions are not typed, etc. etc. etc. |
442 | |
443 | A type constraint is at heart a small "check if a value is valid" |
444 | function. A constraint can be associated with an attribute. This |
445 | simplifies parameter validation, and makes your code clearer to read, |
446 | because you can refer to constraints by name. |
447 | |
448 | =head2 Slightly Less Important Caveat |
449 | |
450 | It is B<always> a good idea to quote your type names. |
451 | |
452 | This prevents Perl from trying to execute the call as an indirect |
453 | object call. This can be an issue when you have a subtype with the |
454 | same name as a valid class. |
455 | |
456 | For instance: |
457 | |
458 | subtype DateTime => as Object => where { $_->isa('DateTime') }; |
459 | |
460 | will I<just work>, while this: |
461 | |
462 | use DateTime; |
463 | subtype DateTime => as Object => where { $_->isa('DateTime') }; |
464 | |
465 | will fail silently and cause many headaches. The simple way to solve |
466 | this, as well as future proof your subtypes from classes which have |
467 | yet to have been created, is to quote the type name: |
468 | |
469 | use DateTime; |
470 | subtype 'DateTime' => as 'Object' => where { $_->isa('DateTime') }; |
471 | |
472 | =head2 Default Type Constraints |
473 | |
474 | This module also provides a simple hierarchy for Perl 5 types, here is |
475 | that hierarchy represented visually. |
476 | |
dba2e142 |
477 | Any |
5893ee36 |
478 | Item |
479 | Bool |
480 | Maybe[`a] |
481 | Undef |
482 | Defined |
483 | Value |
5893ee36 |
484 | Str |
dba2e142 |
485 | Num |
486 | Int |
487 | ClassName |
488 | RoleName |
5893ee36 |
489 | Ref |
490 | ScalarRef |
491 | ArrayRef[`a] |
492 | HashRef[`a] |
493 | CodeRef |
494 | RegexpRef |
495 | GlobRef |
dba2e142 |
496 | FileHandle |
5893ee36 |
497 | Object |
5893ee36 |
498 | |
499 | B<NOTE:> Any type followed by a type parameter C<[`a]> can be |
500 | parameterized, this means you can say: |
501 | |
502 | ArrayRef[Int] # an array of integers |
503 | HashRef[CodeRef] # a hash of str to CODE ref mappings |
504 | Maybe[Str] # value may be a string, may be undefined |
505 | |
506 | If Mouse finds a name in brackets that it does not recognize as an |
507 | existing type, it assumes that this is a class name, for example |
508 | C<ArrayRef[DateTime]>. |
509 | |
5893ee36 |
510 | B<NOTE:> The C<Undef> type constraint for the most part works |
511 | correctly now, but edge cases may still exist, please use it |
512 | sparingly. |
513 | |
514 | B<NOTE:> The C<ClassName> type constraint does a complex package |
515 | existence check. This means that your class B<must> be loaded for this |
516 | type constraint to pass. |
517 | |
518 | B<NOTE:> The C<RoleName> constraint checks a string is a I<package |
519 | name> which is a role, like C<'MyApp::Role::Comparable'>. The C<Role> |
520 | constraint checks that an I<object does> the named role. |
521 | |
522 | =head2 Type Constraint Naming |
523 | |
524 | Type name declared via this module can only contain alphanumeric |
525 | characters, colons (:), and periods (.). |
526 | |
527 | Since the types created by this module are global, it is suggested |
528 | that you namespace your types just as you would namespace your |
529 | modules. So instead of creating a I<Color> type for your |
530 | B<My::Graphics> module, you would call the type |
531 | I<My::Graphics::Types::Color> instead. |
532 | |
533 | =head2 Use with Other Constraint Modules |
534 | |
535 | This module can play nicely with other constraint modules with some |
536 | slight tweaking. The C<where> clause in types is expected to be a |
537 | C<CODE> reference which checks it's first argument and returns a |
538 | boolean. Since most constraint modules work in a similar way, it |
539 | should be simple to adapt them to work with Mouse. |
540 | |
541 | For instance, this is how you could use it with |
542 | L<Declare::Constraints::Simple> to declare a completely new type. |
543 | |
544 | type 'HashOfArrayOfObjects', |
545 | { |
546 | where => IsHashRef( |
547 | -keys => HasLength, |
548 | -values => IsArrayRef(IsObject) |
549 | ) |
550 | }; |
551 | |
552 | Here is an example of using L<Test::Deep> and it's non-test |
553 | related C<eq_deeply> function. |
554 | |
555 | type 'ArrayOfHashOfBarsAndRandomNumbers' |
556 | => where { |
557 | eq_deeply($_, |
558 | array_each(subhashof({ |
559 | bar => isa('Bar'), |
560 | random_number => ignore() |
561 | }))) |
562 | }; |
6feb83f1 |
563 | |
564 | =head1 METHODS |
565 | |
24410e3a |
566 | =head2 C<< list_all_builtin_type_constraints -> (Names) >> |
6feb83f1 |
567 | |
24410e3a |
568 | Returns the names of builtin type constraints. |
569 | |
570 | =head2 C<< list_all_type_constraints -> (Names) >> |
571 | |
572 | Returns the names of all the type constraints. |
6feb83f1 |
573 | |
c91d12e0 |
574 | =head1 FUNCTIONS |
575 | |
576 | =over 4 |
577 | |
c9cc6884 |
578 | =item C<< type $name => where { } ... -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
579 | |
c9cc6884 |
580 | =item C<< subtype $name => as $parent => where { } ... -> Mouse::Meta::TypeConstraint >> |
581 | |
582 | =item C<< subtype as $parent => where { } ... -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
583 | |
1820fffe |
584 | =item C<< class_type ($class, ?$options) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
585 | |
1820fffe |
586 | =item C<< role_type ($role, ?$options) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
587 | |
c9cc6884 |
588 | =item C<< duck_type($name, @methods | \@methods) -> Mouse::Meta::TypeConstraint >> |
589 | |
590 | =item C<< duck_type(\@methods) -> Mouse::Meta::TypeConstraint >> |
591 | |
592 | =item C<< enum($name, @values | \@values) -> Mouse::Meta::TypeConstraint >> |
593 | |
1820fffe |
594 | =item C<< enum (\@values) -> Mouse::Meta::TypeConstraint >> |
595 | |
87f1f3d2 |
596 | =item C<< coerce $type => from $another_type, via { }, ... >> |
597 | |
1820fffe |
598 | =back |
599 | |
600 | =over 4 |
601 | |
602 | =item C<< find_type_constraint(Type) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
603 | |
604 | =back |
605 | |
5893ee36 |
606 | =head1 THANKS |
607 | |
1820fffe |
608 | Much of this documentation was taken from C<Moose::Util::TypeConstraints> |
609 | |
610 | =head1 SEE ALSO |
611 | |
612 | L<Moose::Util::TypeConstraints> |
5893ee36 |
613 | |
6feb83f1 |
614 | =cut |
615 | |
616 | |