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 |
35ce550a |
20 | register_type_constraint |
bc69ee88 |
21 | )], |
139d92d2 |
22 | ); |
23 | |
718b5d9b |
24 | our @CARP_NOT = qw(Mouse::Meta::Attribute); |
25 | |
cceb0e25 |
26 | my %TYPE; |
4188b837 |
27 | |
df448257 |
28 | # The root type |
29 | $TYPE{Any} = Mouse::Meta::TypeConstraint->new( |
30 | name => 'Any', |
31 | ); |
32 | |
33 | my @builtins = ( |
34 | # $name => $parent, $code, |
35 | |
36 | # the base type |
37 | Item => 'Any', undef, |
38 | |
39 | # the maybe[] type |
40 | Maybe => 'Item', undef, |
41 | |
42 | # value types |
43 | Undef => 'Item', \&Undef, |
44 | Defined => 'Item', \&Defined, |
45 | Bool => 'Item', \&Bool, |
46 | Value => 'Defined', \&Value, |
47 | Str => 'Value', \&Str, |
48 | Num => 'Str', \&Num, |
49 | Int => 'Num', \&Int, |
50 | |
51 | # ref types |
52 | Ref => 'Defined', \&Ref, |
53 | ScalarRef => 'Ref', \&ScalarRef, |
54 | ArrayRef => 'Ref', \&ArrayRef, |
55 | HashRef => 'Ref', \&HashRef, |
56 | CodeRef => 'Ref', \&CodeRef, |
57 | RegexpRef => 'Ref', \&RegexpRef, |
58 | GlobRef => 'Ref', \&GlobRef, |
59 | |
60 | # object types |
61 | FileHandle => 'GlobRef', \&FileHandle, |
62 | Object => 'Ref', \&Object, |
63 | |
64 | # special string types |
65 | ClassName => 'Str', \&ClassName, |
66 | RoleName => 'ClassName', \&RoleName, |
67 | ); |
68 | |
69 | |
70 | while (my ($name, $parent, $code) = splice @builtins, 0, 3) { |
71 | $TYPE{$name} = Mouse::Meta::TypeConstraint->new( |
72 | name => $name, |
73 | parent => $TYPE{$parent}, |
74 | optimized => $code, |
75 | ); |
76 | } |
77 | |
78 | # make it parametarizable |
79 | |
80 | $TYPE{Maybe} {constraint_generator} = \&_parameterize_Maybe_for; |
81 | $TYPE{ArrayRef}{constraint_generator} = \&_parameterize_ArrayRef_for; |
82 | $TYPE{HashRef} {constraint_generator} = \&_parameterize_HashRef_for; |
83 | |
84 | # sugars |
85 | |
a4b15169 |
86 | sub as ($) { (as => $_[0]) } ## no critic |
87 | sub where (&) { (where => $_[0]) } ## no critic |
88 | sub message (&) { (message => $_[0]) } ## no critic |
89 | sub optimize_as (&) { (optimize_as => $_[0]) } ## no critic |
61a02a3a |
90 | |
73766a27 |
91 | sub from { @_ } |
a4b15169 |
92 | sub via (&) { $_[0] } ## no critic |
61a02a3a |
93 | |
df448257 |
94 | # type utilities |
993e62a7 |
95 | |
df448257 |
96 | sub optimized_constraints { # DEPRECATED |
97 | Carp::cluck('optimized_constraints() has been deprecated'); |
98 | return \%TYPE; |
99 | } |
d3982c7e |
100 | |
df448257 |
101 | undef @builtins; # free the allocated memory |
102 | @builtins = keys %TYPE; # reuse it |
103 | sub list_all_builtin_type_constraints { @builtins } |
d4571def |
104 | |
df448257 |
105 | sub list_all_type_constraints { keys %TYPE } |
993e62a7 |
106 | |
f5ee065f |
107 | sub _create_type{ |
108 | my $mode = shift; |
109 | |
73766a27 |
110 | my $name; |
f5ee065f |
111 | my %args; |
73766a27 |
112 | |
f5ee065f |
113 | if(@_ == 1 && ref $_[0]){ # @_ : { name => $name, where => ... } |
114 | %args = %{$_[0]}; |
73766a27 |
115 | } |
f5ee065f |
116 | elsif(@_ == 2 && ref $_[1]){ # @_ : $name => { where => ... } |
73766a27 |
117 | $name = $_[0]; |
f5ee065f |
118 | %args = %{$_[1]}; |
73766a27 |
119 | } |
f5ee065f |
120 | elsif(@_ % 2){ # @_ : $name => ( where => ... ) |
121 | ($name, %args) = @_; |
73766a27 |
122 | } |
f5ee065f |
123 | else{ # @_ : (name => $name, where => ...) |
124 | %args = @_; |
73766a27 |
125 | } |
126 | |
f5ee065f |
127 | if(!defined $name){ |
4f24c598 |
128 | $name = $args{name}; |
cd2b9201 |
129 | } |
d4571def |
130 | |
f5ee065f |
131 | $args{name} = $name; |
b8434acc |
132 | my $parent; |
133 | if($mode eq 'subtype'){ |
134 | $parent = delete $args{as}; |
135 | if(!$parent){ |
136 | $parent = delete $args{name}; |
4f24c598 |
137 | $name = undef; |
b8434acc |
138 | } |
139 | } |
7dbebb1b |
140 | |
4f24c598 |
141 | if(defined $name){ |
df448257 |
142 | # set 'package_defined_in' only if it is not a core package |
143 | my $this = $args{package_defined_in}; |
144 | if(!$this){ |
145 | $this = caller(1); |
146 | if($this !~ /\A Mouse \b/xms){ |
147 | $args{package_defined_in} = $this; |
148 | } |
149 | } |
150 | |
151 | if($TYPE{$name}){ |
152 | my $that = $TYPE{$name}->{package_defined_in} || __PACKAGE__; |
718b5d9b |
153 | ($this eq $that) or Carp::croak( |
df448257 |
154 | "The type constraint '$name' has already been created in $that and cannot be created again in $this" |
155 | ); |
4f24c598 |
156 | } |
157 | } |
158 | else{ |
159 | $args{name} = '__ANON__'; |
f5ee065f |
160 | } |
d4571def |
161 | |
b8434acc |
162 | $args{constraint} = delete $args{where} if exists $args{where}; |
24410e3a |
163 | $args{optimized} = delete $args{optimized_as} if exists $args{optimized_as}; |
0d9fea22 |
164 | |
f5ee065f |
165 | my $constraint; |
166 | if($mode eq 'subtype'){ |
24410e3a |
167 | $constraint = find_or_create_isa_type_constraint($parent)->create_child_type(%args); |
7a50b450 |
168 | } |
169 | else{ |
f5ee065f |
170 | $constraint = Mouse::Meta::TypeConstraint->new(%args); |
73766a27 |
171 | } |
7dbebb1b |
172 | |
4f24c598 |
173 | if(defined $name){ |
174 | return $TYPE{$name} = $constraint; |
175 | } |
176 | else{ |
177 | return $constraint; |
178 | } |
f5ee065f |
179 | } |
7dbebb1b |
180 | |
f5ee065f |
181 | sub type { |
182 | return _create_type('type', @_); |
183 | } |
d4571def |
184 | |
f5ee065f |
185 | sub subtype { |
186 | return _create_type('subtype', @_); |
4188b837 |
187 | } |
188 | |
139d92d2 |
189 | sub coerce { |
ffbbf459 |
190 | my $type_name = shift; |
61a02a3a |
191 | |
ffbbf459 |
192 | my $type = find_type_constraint($type_name) |
718b5d9b |
193 | or Carp::croak("Cannot find type '$type_name', perhaps you forgot to load it."); |
61a02a3a |
194 | |
ffbbf459 |
195 | $type->_add_type_coercions(@_); |
cd2b9201 |
196 | return; |
4188b837 |
197 | } |
198 | |
139d92d2 |
199 | sub class_type { |
337e3b0c |
200 | my($name, $options) = @_; |
201 | my $class = $options->{class} || $name; |
df448257 |
202 | |
203 | # ClassType |
337e3b0c |
204 | return _create_type 'subtype', $name => ( |
ddbad0b1 |
205 | as => 'Object', |
e3540312 |
206 | optimized_as => Mouse::Util::generate_isa_predicate_for($class), |
337e3b0c |
207 | ); |
ecc6e3b1 |
208 | } |
209 | |
139d92d2 |
210 | sub role_type { |
337e3b0c |
211 | my($name, $options) = @_; |
212 | my $role = $options->{role} || $name; |
df448257 |
213 | |
214 | # RoleType |
337e3b0c |
215 | return _create_type 'subtype', $name => ( |
1d5ecd5f |
216 | as => 'Object', |
b7d1f970 |
217 | optimized_as => sub { Scalar::Util::blessed($_[0]) && does_role($_[0], $role) }, |
61a02a3a |
218 | ); |
47f36c05 |
219 | } |
220 | |
ebe91068 |
221 | sub duck_type { |
222 | my($name, @methods); |
223 | |
224 | if(!(@_ == 1 && ref($_[0]) eq 'ARRAY')){ |
225 | $name = shift; |
226 | } |
227 | |
228 | @methods = (@_ == 1 && ref($_[0]) eq 'ARRAY') ? @{$_[0]} : @_; |
229 | |
df448257 |
230 | # DuckType |
188ff28f |
231 | return _create_type 'subtype', $name => ( |
232 | as => 'Object', |
ebe91068 |
233 | optimized_as => Mouse::Util::generate_can_predicate_for(\@methods), |
ebe91068 |
234 | ); |
235 | } |
236 | |
d44f0d03 |
237 | sub enum { |
f5ee065f |
238 | my($name, %valid); |
239 | |
f152b099 |
240 | if(!(@_ == 1 && ref($_[0]) eq 'ARRAY')){ |
241 | $name = shift; |
f5ee065f |
242 | } |
f152b099 |
243 | |
244 | %valid = map{ $_ => undef } (@_ == 1 && ref($_[0]) eq 'ARRAY' ? @{$_[0]} : @_); |
245 | |
df448257 |
246 | # EnumType |
188ff28f |
247 | return _create_type 'subtype', $name => ( |
248 | as => 'Str', |
f5ee065f |
249 | optimized_as => sub{ defined($_[0]) && !ref($_[0]) && exists $valid{$_[0]} }, |
f5ee065f |
250 | ); |
251 | } |
252 | |
253 | sub _find_or_create_regular_type{ |
718b5d9b |
254 | my($spec, $create) = @_; |
f5ee065f |
255 | |
256 | return $TYPE{$spec} if exists $TYPE{$spec}; |
01904723 |
257 | |
718b5d9b |
258 | my $meta = Mouse::Util::get_metaclass_by_name($spec); |
259 | |
260 | if(!defined $meta){ |
261 | return $create ? class_type($spec) : undef; |
262 | } |
01904723 |
263 | |
f48920c1 |
264 | if(Mouse::Util::is_a_metarole($meta)){ |
1d5ecd5f |
265 | return role_type($spec); |
f5ee065f |
266 | } |
267 | else{ |
1d5ecd5f |
268 | return class_type($spec); |
f5ee065f |
269 | } |
d44f0d03 |
270 | } |
271 | |
f5ee065f |
272 | sub _find_or_create_parameterized_type{ |
273 | my($base, $param) = @_; |
274 | |
275 | my $name = sprintf '%s[%s]', $base->name, $param->name; |
276 | |
b4d791ba |
277 | $TYPE{$name} ||= $base->parameterize($param, $name); |
f5ee065f |
278 | } |
b4d791ba |
279 | |
f5ee065f |
280 | sub _find_or_create_union_type{ |
718b5d9b |
281 | return if grep{ not defined } @_; |
a2f1294a |
282 | my @types = sort map{ $_->{type_constraints} ? @{$_->{type_constraints}} : $_ } @_; |
f5ee065f |
283 | |
30b28db3 |
284 | my $name = join '|', @types; |
f5ee065f |
285 | |
df448257 |
286 | # UnionType |
b4d791ba |
287 | $TYPE{$name} ||= Mouse::Meta::TypeConstraint->new( |
288 | name => $name, |
289 | type_constraints => \@types, |
b4d791ba |
290 | ); |
f5ee065f |
291 | } |
292 | |
293 | # The type parser |
f5ee065f |
294 | |
718b5d9b |
295 | # param : '[' type ']' | NOTHING |
296 | sub _parse_param { |
297 | my($c) = @_; |
f5ee065f |
298 | |
718b5d9b |
299 | if($c->{spec} =~ s/^\[//){ |
300 | my $type = _parse_type($c, 1); |
f5ee065f |
301 | |
718b5d9b |
302 | if($c->{spec} =~ s/^\]//){ |
303 | return $type; |
321e5271 |
304 | } |
718b5d9b |
305 | Carp::croak("Syntax error in type: missing right square bracket in '$c->{orig}'"); |
306 | } |
57f0e313 |
307 | |
718b5d9b |
308 | return undef; |
309 | } |
f5ee065f |
310 | |
718b5d9b |
311 | # name : [\w.:]+ |
312 | sub _parse_name { |
313 | my($c, $create) = @_; |
f5ee065f |
314 | |
718b5d9b |
315 | if($c->{spec} =~ s/\A ([\w.:]+) //xms){ |
316 | return _find_or_create_regular_type($1, $create); |
317 | } |
318 | Carp::croak("Syntax error in type: expect type name near '$c->{spec}' in '$c->{orig}'"); |
319 | } |
f5ee065f |
320 | |
718b5d9b |
321 | # single_type : name param |
322 | sub _parse_single_type { |
323 | my($c, $create) = @_; |
f5ee065f |
324 | |
718b5d9b |
325 | my $type = _parse_name($c, $create); |
326 | my $param = _parse_param($c); |
29376895 |
327 | |
718b5d9b |
328 | if(defined $type){ |
329 | if(defined $param){ |
330 | return _find_or_create_parameterized_type($type, $param); |
29376895 |
331 | } |
718b5d9b |
332 | else { |
333 | return $type; |
29376895 |
334 | } |
f5ee065f |
335 | } |
718b5d9b |
336 | elsif(defined $param){ |
337 | Carp::croak("Undefined type with parameter [$param] in '$c->{orig}'"); |
993e62a7 |
338 | } |
339 | else{ |
718b5d9b |
340 | return undef; |
993e62a7 |
341 | } |
321e5271 |
342 | } |
343 | |
718b5d9b |
344 | # type : single_type ('|' single_type)* |
345 | sub _parse_type { |
346 | my($c, $create) = @_; |
347 | |
348 | my $type = _parse_single_type($c, $create); |
349 | if($c->{spec}){ # can be an union type |
350 | my @types; |
351 | while($c->{spec} =~ s/^\|//){ |
352 | push @types, _parse_single_type($c, $create); |
353 | } |
354 | if(@types){ |
355 | return _find_or_create_union_type($type, @types); |
356 | } |
357 | } |
358 | return $type; |
359 | } |
360 | |
f5ee065f |
361 | |
362 | sub find_type_constraint { |
363 | my($spec) = @_; |
f48920c1 |
364 | return $spec if Mouse::Util::is_a_type_constraint($spec); |
df448257 |
365 | return undef if !defined $spec; |
f5ee065f |
366 | |
367 | $spec =~ s/\s+//g; |
368 | return $TYPE{$spec}; |
2efc0af1 |
369 | } |
370 | |
35ce550a |
371 | sub register_type_constraint { |
372 | my($constraint) = @_; |
373 | Carp::croak("No type supplied / type is not a valid type constraint") |
374 | unless Mouse::Util::is_a_type_constraint($constraint); |
375 | my $name = $constraint->name; |
376 | Carp::croak("can't register an unnamed type constraint") |
377 | unless defined $name; |
378 | return $TYPE{$name} = $constraint; |
379 | } |
380 | |
f5ee065f |
381 | sub find_or_parse_type_constraint { |
382 | my($spec) = @_; |
f48920c1 |
383 | return $spec if Mouse::Util::is_a_type_constraint($spec); |
df448257 |
384 | return undef if !defined $spec; |
9c85e9dc |
385 | |
f5ee065f |
386 | $spec =~ s/\s+//g; |
387 | return $TYPE{$spec} || do{ |
718b5d9b |
388 | my $context = { |
389 | spec => $spec, |
390 | orig => $spec, |
391 | }; |
392 | my $type = _parse_type($context); |
393 | |
394 | if($context->{spec}){ |
395 | Carp::croak("Syntax error: extra elements '$context->{spec}' in '$context->{orig}'"); |
396 | } |
f5ee065f |
397 | $type; |
398 | }; |
399 | } |
321e5271 |
400 | |
f5ee065f |
401 | sub find_or_create_does_type_constraint{ |
ddbad0b1 |
402 | # XXX: Moose does not register a new role_type, but Mouse does. |
bddbe49f |
403 | return find_or_parse_type_constraint(@_) || role_type(@_); |
f5ee065f |
404 | } |
405 | |
406 | sub find_or_create_isa_type_constraint { |
ddbad0b1 |
407 | # XXX: Moose does not register a new class_type, but Mouse does. |
f5ee065f |
408 | return find_or_parse_type_constraint(@_) || class_type(@_); |
321e5271 |
409 | } |
410 | |
d60c78b9 |
411 | 1; |
6feb83f1 |
412 | __END__ |
413 | |
414 | =head1 NAME |
415 | |
5893ee36 |
416 | Mouse::Util::TypeConstraints - Type constraint system for Mouse |
417 | |
a25ca8d6 |
418 | =head1 VERSION |
419 | |
d88885bd |
420 | This document describes Mouse version 0.64 |
a25ca8d6 |
421 | |
5893ee36 |
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 | |
dba2e142 |
488 | Any |
5893ee36 |
489 | Item |
490 | Bool |
491 | Maybe[`a] |
492 | Undef |
493 | Defined |
494 | Value |
5893ee36 |
495 | Str |
dba2e142 |
496 | Num |
497 | Int |
498 | ClassName |
499 | RoleName |
5893ee36 |
500 | Ref |
501 | ScalarRef |
502 | ArrayRef[`a] |
503 | HashRef[`a] |
504 | CodeRef |
505 | RegexpRef |
506 | GlobRef |
dba2e142 |
507 | FileHandle |
5893ee36 |
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 | |
5893ee36 |
521 | B<NOTE:> The C<Undef> type constraint for the most part works |
522 | correctly now, but edge cases may still exist, please use it |
523 | sparingly. |
524 | |
525 | B<NOTE:> The C<ClassName> type constraint does a complex package |
526 | existence check. This means that your class B<must> be loaded for this |
527 | type constraint to pass. |
528 | |
529 | B<NOTE:> The C<RoleName> constraint checks a string is a I<package |
530 | name> which is a role, like C<'MyApp::Role::Comparable'>. The C<Role> |
531 | constraint checks that an I<object does> the named role. |
532 | |
533 | =head2 Type Constraint Naming |
534 | |
535 | Type name declared via this module can only contain alphanumeric |
536 | characters, colons (:), and periods (.). |
537 | |
538 | Since the types created by this module are global, it is suggested |
539 | that you namespace your types just as you would namespace your |
540 | modules. So instead of creating a I<Color> type for your |
541 | B<My::Graphics> module, you would call the type |
542 | I<My::Graphics::Types::Color> instead. |
543 | |
544 | =head2 Use with Other Constraint Modules |
545 | |
546 | This module can play nicely with other constraint modules with some |
547 | slight tweaking. The C<where> clause in types is expected to be a |
548 | C<CODE> reference which checks it's first argument and returns a |
549 | boolean. Since most constraint modules work in a similar way, it |
550 | should be simple to adapt them to work with Mouse. |
551 | |
552 | For instance, this is how you could use it with |
553 | L<Declare::Constraints::Simple> to declare a completely new type. |
554 | |
555 | type 'HashOfArrayOfObjects', |
556 | { |
557 | where => IsHashRef( |
558 | -keys => HasLength, |
559 | -values => IsArrayRef(IsObject) |
560 | ) |
561 | }; |
562 | |
563 | Here is an example of using L<Test::Deep> and it's non-test |
564 | related C<eq_deeply> function. |
565 | |
566 | type 'ArrayOfHashOfBarsAndRandomNumbers' |
567 | => where { |
568 | eq_deeply($_, |
569 | array_each(subhashof({ |
570 | bar => isa('Bar'), |
571 | random_number => ignore() |
572 | }))) |
573 | }; |
6feb83f1 |
574 | |
575 | =head1 METHODS |
576 | |
24410e3a |
577 | =head2 C<< list_all_builtin_type_constraints -> (Names) >> |
6feb83f1 |
578 | |
24410e3a |
579 | Returns the names of builtin type constraints. |
580 | |
581 | =head2 C<< list_all_type_constraints -> (Names) >> |
582 | |
583 | Returns the names of all the type constraints. |
6feb83f1 |
584 | |
c91d12e0 |
585 | =head1 FUNCTIONS |
586 | |
587 | =over 4 |
588 | |
c9cc6884 |
589 | =item C<< type $name => where { } ... -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
590 | |
c9cc6884 |
591 | =item C<< subtype $name => as $parent => where { } ... -> Mouse::Meta::TypeConstraint >> |
592 | |
593 | =item C<< subtype as $parent => where { } ... -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
594 | |
1820fffe |
595 | =item C<< class_type ($class, ?$options) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
596 | |
1820fffe |
597 | =item C<< role_type ($role, ?$options) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
598 | |
c9cc6884 |
599 | =item C<< duck_type($name, @methods | \@methods) -> Mouse::Meta::TypeConstraint >> |
600 | |
601 | =item C<< duck_type(\@methods) -> Mouse::Meta::TypeConstraint >> |
602 | |
603 | =item C<< enum($name, @values | \@values) -> Mouse::Meta::TypeConstraint >> |
604 | |
1820fffe |
605 | =item C<< enum (\@values) -> Mouse::Meta::TypeConstraint >> |
606 | |
87f1f3d2 |
607 | =item C<< coerce $type => from $another_type, via { }, ... >> |
608 | |
1820fffe |
609 | =back |
610 | |
611 | =over 4 |
612 | |
613 | =item C<< find_type_constraint(Type) -> Mouse::Meta::TypeConstraint >> |
c91d12e0 |
614 | |
615 | =back |
616 | |
5893ee36 |
617 | =head1 THANKS |
618 | |
1820fffe |
619 | Much of this documentation was taken from C<Moose::Util::TypeConstraints> |
620 | |
621 | =head1 SEE ALSO |
622 | |
623 | L<Moose::Util::TypeConstraints> |
5893ee36 |
624 | |
6feb83f1 |
625 | =cut |
626 | |
627 | |