Commit | Line | Data |
a15dff8d |
1 | |
2 | package Moose::Util::TypeConstraints; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
998a8a25 |
7 | use Carp (); |
e3979c3e |
8 | use List::MoreUtils qw( all ); |
21f1e231 |
9 | use Scalar::Util 'blessed'; |
e606ae5f |
10 | use Moose::Exporter; |
a15dff8d |
11 | |
82750a8a |
12 | our $VERSION = '0.62_01'; |
e606ae5f |
13 | $VERSION = eval $VERSION; |
d44714be |
14 | our $AUTHORITY = 'cpan:STEVAN'; |
a15dff8d |
15 | |
d9b40005 |
16 | ## -------------------------------------------------------- |
e85d2a5d |
17 | # Prototyped subs must be predeclared because we have a |
18 | # circular dependency with Moose::Meta::Attribute et. al. |
19 | # so in case of us being use'd first the predeclaration |
d9b40005 |
20 | # ensures the prototypes are in scope when consumers are |
21 | # compiled. |
22 | |
d9b40005 |
23 | # dah sugah! |
d9b40005 |
24 | sub where (&); |
25 | sub via (&); |
26 | sub message (&); |
27 | sub optimize_as (&); |
d9b40005 |
28 | |
e85d2a5d |
29 | ## private stuff ... |
d9b40005 |
30 | sub _create_type_constraint ($$$;$$); |
31 | sub _install_type_coercions ($$); |
32 | |
33 | ## -------------------------------------------------------- |
8c4acc60 |
34 | |
4e036ee4 |
35 | use Moose::Meta::TypeConstraint; |
3726f905 |
36 | use Moose::Meta::TypeConstraint::Union; |
0fbd4b0a |
37 | use Moose::Meta::TypeConstraint::Parameterized; |
7e4e1ad4 |
38 | use Moose::Meta::TypeConstraint::Parameterizable; |
620db045 |
39 | use Moose::Meta::TypeConstraint::Class; |
40 | use Moose::Meta::TypeConstraint::Role; |
dabed765 |
41 | use Moose::Meta::TypeConstraint::Enum; |
2ca63f5d |
42 | use Moose::Meta::TypeCoercion; |
3726f905 |
43 | use Moose::Meta::TypeCoercion::Union; |
22aed3c0 |
44 | use Moose::Meta::TypeConstraint::Registry; |
28ffb449 |
45 | use Moose::Util::TypeConstraints::OptimizedConstraints; |
4e036ee4 |
46 | |
e606ae5f |
47 | Moose::Exporter->setup_import_methods( |
48 | as_is => [ |
49 | qw( |
50 | type subtype class_type role_type as where message optimize_as |
51 | coerce from via |
52 | enum |
53 | find_type_constraint |
54 | register_type_constraint ) |
55 | ], |
56 | _export_to_main => 1, |
57 | ); |
a15dff8d |
58 | |
d9b40005 |
59 | ## -------------------------------------------------------- |
60 | ## type registry and some useful functions for it |
61 | ## -------------------------------------------------------- |
62 | |
22aed3c0 |
63 | my $REGISTRY = Moose::Meta::TypeConstraint::Registry->new; |
587ae0d2 |
64 | |
d9b40005 |
65 | sub get_type_constraint_registry { $REGISTRY } |
e85d2a5d |
66 | sub list_all_type_constraints { keys %{$REGISTRY->type_constraints} } |
d9b40005 |
67 | sub export_type_constraints_as_functions { |
68 | my $pkg = caller(); |
69 | no strict 'refs'; |
a0f8153d |
70 | foreach my $constraint (keys %{$REGISTRY->type_constraints}) { |
42bc21a4 |
71 | my $tc = $REGISTRY->get_type_constraint($constraint)->_compiled_type_constraint; |
d2f0f6e9 |
72 | *{"${pkg}::${constraint}"} = sub { $tc->($_[0]) ? 1 : undef }; # the undef is for compat |
a0f8153d |
73 | } |
d9b40005 |
74 | } |
182134e8 |
75 | |
0c015f1b |
76 | sub create_type_constraint_union { |
d9b40005 |
77 | my @type_constraint_names; |
e85d2a5d |
78 | |
f1917f58 |
79 | if (scalar @_ == 1 && _detect_type_constraint_union($_[0])) { |
80 | @type_constraint_names = _parse_type_constraint_union($_[0]); |
d9b40005 |
81 | } |
82 | else { |
83 | @type_constraint_names = @_; |
429ccc11 |
84 | } |
eb4c4e82 |
85 | |
3726f905 |
86 | (scalar @type_constraint_names >= 2) |
c245d69b |
87 | || Moose->throw_error("You must pass in at least 2 type names to make a union"); |
e85d2a5d |
88 | |
84a9c64c |
89 | my @type_constraints = map { |
08380fdb |
90 | find_or_parse_type_constraint($_) || |
fa92d705 |
91 | Moose->throw_error("Could not locate type constraint ($_) for the union"); |
08380fdb |
92 | } @type_constraint_names; |
84a9c64c |
93 | |
3726f905 |
94 | return Moose::Meta::TypeConstraint::Union->new( |
fa92d705 |
95 | type_constraints => \@type_constraints |
e85d2a5d |
96 | ); |
182134e8 |
97 | } |
a15dff8d |
98 | |
0c015f1b |
99 | sub create_parameterized_type_constraint { |
d9b40005 |
100 | my $type_constraint_name = shift; |
98407b93 |
101 | my ($base_type, $type_parameter) = _parse_parameterized_type_constraint($type_constraint_name); |
e85d2a5d |
102 | |
98407b93 |
103 | (defined $base_type && defined $type_parameter) |
c245d69b |
104 | || Moose->throw_error("Could not parse type name ($type_constraint_name) correctly"); |
e85d2a5d |
105 | |
90e78884 |
106 | if ($REGISTRY->has_type_constraint($base_type)) { |
107 | my $base_type_tc = $REGISTRY->get_type_constraint($base_type); |
108 | return _create_parameterized_type_constraint( |
109 | $base_type_tc, |
110 | $type_parameter |
111 | ); |
112 | } else { |
113 | Moose->throw_error("Could not locate the base type ($base_type)"); |
114 | } |
22aed3c0 |
115 | } |
116 | |
90e78884 |
117 | sub _create_parameterized_type_constraint { |
118 | my ( $base_type_tc, $type_parameter ) = @_; |
119 | if ( $base_type_tc->can('parameterize') ) { |
120 | return $base_type_tc->parameterize($type_parameter); |
121 | } else { |
122 | return Moose::Meta::TypeConstraint::Parameterized->new( |
123 | name => $base_type_tc->name . '[' . $type_parameter . ']', |
124 | parent => $base_type_tc, |
125 | type_parameter => find_or_create_isa_type_constraint($type_parameter), |
126 | ); |
127 | } |
128 | } |
129 | |
4ab662d6 |
130 | #should we also support optimized checks? |
0c015f1b |
131 | sub create_class_type_constraint { |
620db045 |
132 | my ( $class, $options ) = @_; |
133 | |
3fef8ce8 |
134 | # too early for this check |
135 | #find_type_constraint("ClassName")->check($class) |
c245d69b |
136 | # || Moose->throw_error("Can't create a class type constraint because '$class' is not a class name"); |
3fef8ce8 |
137 | |
620db045 |
138 | my %options = ( |
139 | class => $class, |
140 | name => $class, |
141 | %{ $options || {} }, |
4ab662d6 |
142 | ); |
620db045 |
143 | |
144 | $options{name} ||= "__ANON__"; |
145 | |
146 | Moose::Meta::TypeConstraint::Class->new( %options ); |
3fef8ce8 |
147 | } |
148 | |
0c015f1b |
149 | sub create_role_type_constraint { |
620db045 |
150 | my ( $role, $options ) = @_; |
e85d2a5d |
151 | |
620db045 |
152 | # too early for this check |
153 | #find_type_constraint("ClassName")->check($class) |
c245d69b |
154 | # || Moose->throw_error("Can't create a class type constraint because '$class' is not a class name"); |
e85d2a5d |
155 | |
620db045 |
156 | my %options = ( |
157 | role => $role, |
158 | name => $role, |
159 | %{ $options || {} }, |
160 | ); |
e85d2a5d |
161 | |
620db045 |
162 | $options{name} ||= "__ANON__"; |
163 | |
164 | Moose::Meta::TypeConstraint::Role->new( %options ); |
165 | } |
166 | |
167 | |
0c015f1b |
168 | sub find_or_create_type_constraint { |
620db045 |
169 | my ( $type_constraint_name, $options_for_anon_type ) = @_; |
170 | |
171 | if ( my $constraint = find_or_parse_type_constraint($type_constraint_name) ) { |
172 | return $constraint; |
d9b40005 |
173 | } |
620db045 |
174 | elsif ( defined $options_for_anon_type ) { |
d9b40005 |
175 | # NOTE: |
4ab662d6 |
176 | # if there is no $options_for_anon_type |
177 | # specified, then we assume they don't |
f3c4e20e |
178 | # want to create one, and return nothing. |
f3c4e20e |
179 | |
d9b40005 |
180 | # otherwise assume that we should create |
e85d2a5d |
181 | # an ANON type with the $options_for_anon_type |
d9b40005 |
182 | # options which can be passed in. It should |
e85d2a5d |
183 | # be noted that these don't get registered |
d9b40005 |
184 | # so we need to return it. |
185 | # - SL |
186 | return Moose::Meta::TypeConstraint->new( |
187 | name => '__ANON__', |
e85d2a5d |
188 | %{$options_for_anon_type} |
d9b40005 |
189 | ); |
190 | } |
e85d2a5d |
191 | |
620db045 |
192 | return; |
193 | } |
194 | |
0c015f1b |
195 | sub find_or_create_isa_type_constraint { |
620db045 |
196 | my $type_constraint_name = shift; |
5e2ada84 |
197 | find_or_parse_type_constraint($type_constraint_name) || create_class_type_constraint($type_constraint_name) |
620db045 |
198 | } |
199 | |
0c015f1b |
200 | sub find_or_create_does_type_constraint { |
620db045 |
201 | my $type_constraint_name = shift; |
5e2ada84 |
202 | find_or_parse_type_constraint($type_constraint_name) || create_role_type_constraint($type_constraint_name) |
620db045 |
203 | } |
204 | |
0c015f1b |
205 | sub find_or_parse_type_constraint { |
eb4c4e82 |
206 | my $type_constraint_name = normalize_type_constraint_name(shift); |
620db045 |
207 | my $constraint; |
e606ae5f |
208 | |
209 | if ($constraint = find_type_constraint($type_constraint_name)) { |
210 | return $constraint; |
211 | } elsif (_detect_type_constraint_union($type_constraint_name)) { |
620db045 |
212 | $constraint = create_type_constraint_union($type_constraint_name); |
08380fdb |
213 | } elsif (_detect_parameterized_type_constraint($type_constraint_name)) { |
620db045 |
214 | $constraint = create_parameterized_type_constraint($type_constraint_name); |
215 | } else { |
216 | return; |
217 | } |
bb6c8335 |
218 | |
d9b40005 |
219 | $REGISTRY->add_type_constraint($constraint); |
e85d2a5d |
220 | return $constraint; |
d9b40005 |
221 | } |
22aed3c0 |
222 | |
eb4c4e82 |
223 | sub normalize_type_constraint_name { |
84a9c64c |
224 | my $type_constraint_name = shift; |
c8f663b2 |
225 | $type_constraint_name =~ s/\s//g; |
eb4c4e82 |
226 | return $type_constraint_name; |
227 | } |
228 | |
5f223879 |
229 | sub _confess { |
230 | my $error = shift; |
231 | |
232 | local $Carp::CarpLevel = $Carp::CarpLevel + 1; |
233 | Carp::confess($error); |
234 | } |
235 | |
22aed3c0 |
236 | ## -------------------------------------------------------- |
237 | ## exported functions ... |
238 | ## -------------------------------------------------------- |
239 | |
0c015f1b |
240 | sub find_type_constraint { |
eeedfc8a |
241 | my $type = shift; |
242 | |
243 | if ( blessed $type and $type->isa("Moose::Meta::TypeConstraint") ) { |
244 | return $type; |
e606ae5f |
245 | } |
246 | else { |
247 | return unless $REGISTRY->has_type_constraint($type); |
eeedfc8a |
248 | return $REGISTRY->get_type_constraint($type); |
249 | } |
250 | } |
22aed3c0 |
251 | |
0c015f1b |
252 | sub register_type_constraint { |
3fef8ce8 |
253 | my $constraint = shift; |
c245d69b |
254 | Moose->throw_error("can't register an unnamed type constraint") unless defined $constraint->name; |
3fef8ce8 |
255 | $REGISTRY->add_type_constraint($constraint); |
dabed765 |
256 | return $constraint; |
3fef8ce8 |
257 | } |
258 | |
7c13858b |
259 | # type constructors |
a15dff8d |
260 | |
9c27968f |
261 | sub type { |
1b7df21f |
262 | splice(@_, 1, 0, undef); |
a0f8153d |
263 | goto &_create_type_constraint; |
a15dff8d |
264 | } |
265 | |
9c27968f |
266 | sub subtype { |
86629f93 |
267 | # NOTE: |
268 | # this adds an undef for the name |
269 | # if this is an anon-subtype: |
270 | # subtype(Num => where { $_ % 2 == 0 }) # anon 'even' subtype |
e3979c3e |
271 | # or |
272 | # subtype(Num => where { $_ % 2 == 0 }) message { "$_ must be an even number" } |
273 | # |
274 | # but if the last arg is not a code ref then it is a subtype |
275 | # alias: |
276 | # |
86629f93 |
277 | # subtype(MyNumbers => as Num); # now MyNumbers is the same as Num |
e85d2a5d |
278 | # ... yeah I know it's ugly code |
86629f93 |
279 | # - SL |
e3979c3e |
280 | unshift @_ => undef if scalar @_ == 2 && ( 'CODE' eq ref( $_[-1] ) ); |
281 | unshift @_ => undef |
282 | if scalar @_ == 3 && all { ref($_) =~ /^(?:CODE|HASH)$/ } @_[ 1, 2 ]; |
a0f8153d |
283 | goto &_create_type_constraint; |
a15dff8d |
284 | } |
285 | |
9c27968f |
286 | sub class_type { |
4ab662d6 |
287 | register_type_constraint( |
288 | create_class_type_constraint( |
289 | $_[0], |
290 | ( defined($_[1]) ? $_[1] : () ), |
291 | ) |
292 | ); |
3fef8ce8 |
293 | } |
294 | |
620db045 |
295 | sub role_type ($;$) { |
296 | register_type_constraint( |
297 | create_role_type_constraint( |
298 | $_[0], |
299 | ( defined($_[1]) ? $_[1] : () ), |
300 | ) |
301 | ); |
302 | } |
303 | |
9c27968f |
304 | sub coerce { |
e85d2a5d |
305 | my ($type_name, @coercion_map) = @_; |
7c13858b |
306 | _install_type_coercions($type_name, \@coercion_map); |
182134e8 |
307 | } |
308 | |
9c27968f |
309 | sub as { @_ } |
310 | sub from { @_ } |
76d37e5a |
311 | sub where (&) { $_[0] } |
312 | sub via (&) { $_[0] } |
8ecb1fa0 |
313 | |
314 | sub message (&) { +{ message => $_[0] } } |
315 | sub optimize_as (&) { +{ optimized => $_[0] } } |
a15dff8d |
316 | |
9c27968f |
317 | sub enum { |
fcec2383 |
318 | my ($type_name, @values) = @_; |
4ab662d6 |
319 | # NOTE: |
320 | # if only an array-ref is passed then |
9f4334a1 |
321 | # you get an anon-enum |
322 | # - SL |
323 | if (ref $type_name eq 'ARRAY' && !@values) { |
324 | @values = @$type_name; |
325 | $type_name = undef; |
326 | } |
2c0cbef7 |
327 | (scalar @values >= 2) |
c245d69b |
328 | || Moose->throw_error("You must have at least two values to enumerate through"); |
c4fe165f |
329 | my %valid = map { $_ => 1 } @values; |
dabed765 |
330 | |
331 | register_type_constraint( |
332 | create_enum_type_constraint( |
333 | $type_name, |
334 | \@values, |
335 | ) |
336 | ); |
337 | } |
338 | |
0c015f1b |
339 | sub create_enum_type_constraint { |
dabed765 |
340 | my ( $type_name, $values ) = @_; |
e606ae5f |
341 | |
dabed765 |
342 | Moose::Meta::TypeConstraint::Enum->new( |
343 | name => $type_name || '__ANON__', |
344 | values => $values, |
a0f8153d |
345 | ); |
fcec2383 |
346 | } |
347 | |
d9b40005 |
348 | ## -------------------------------------------------------- |
349 | ## desugaring functions ... |
350 | ## -------------------------------------------------------- |
351 | |
e85d2a5d |
352 | sub _create_type_constraint ($$$;$$) { |
d9b40005 |
353 | my $name = shift; |
354 | my $parent = shift; |
8de73ff1 |
355 | my $check = shift; |
e85d2a5d |
356 | |
1da6728b |
357 | my ( $message, $optimized ); |
d9b40005 |
358 | for (@_) { |
359 | $message = $_->{message} if exists $_->{message}; |
e85d2a5d |
360 | $optimized = $_->{optimized} if exists $_->{optimized}; |
d9b40005 |
361 | } |
362 | |
1da6728b |
363 | my $pkg_defined_in = scalar( caller(0) ); |
e85d2a5d |
364 | |
1da6728b |
365 | if ( defined $name ) { |
d9b40005 |
366 | my $type = $REGISTRY->get_type_constraint($name); |
e85d2a5d |
367 | |
5f223879 |
368 | ( $type->_package_defined_in eq $pkg_defined_in ) |
369 | || _confess( |
370 | "The type constraint '$name' has already been created in " |
371 | . $type->_package_defined_in |
372 | . " and cannot be created again in " |
373 | . $pkg_defined_in ) |
374 | if defined $type; |
e85d2a5d |
375 | } |
1da6728b |
376 | |
9ceb576e |
377 | my %opts = ( |
ec8b7b21 |
378 | name => $name, |
d9b40005 |
379 | package_defined_in => $pkg_defined_in, |
e85d2a5d |
380 | |
1da6728b |
381 | ( $check ? ( constraint => $check ) : () ), |
382 | ( $message ? ( message => $message ) : () ), |
383 | ( $optimized ? ( optimized => $optimized ) : () ), |
d9b40005 |
384 | ); |
1da6728b |
385 | |
9ceb576e |
386 | my $constraint; |
1da6728b |
387 | if ( defined $parent |
388 | and $parent |
389 | = blessed $parent ? $parent : find_or_parse_type_constraint($parent) ) |
390 | { |
85a9908f |
391 | $constraint = $parent->create_child_type(%opts); |
1da6728b |
392 | } |
393 | else { |
394 | $constraint = Moose::Meta::TypeConstraint->new(%opts); |
4ab662d6 |
395 | } |
d9b40005 |
396 | |
397 | $REGISTRY->add_type_constraint($constraint) |
398 | if defined $name; |
399 | |
400 | return $constraint; |
401 | } |
402 | |
e85d2a5d |
403 | sub _install_type_coercions ($$) { |
d9b40005 |
404 | my ($type_name, $coercion_map) = @_; |
e606ae5f |
405 | my $type = find_type_constraint($type_name); |
6f9ff1af |
406 | (defined $type) |
c245d69b |
407 | || Moose->throw_error("Cannot find type '$type_name', perhaps you forgot to load it."); |
41e007e4 |
408 | if ($type->has_coercion) { |
409 | $type->coercion->add_type_coercions(@$coercion_map); |
410 | } |
411 | else { |
412 | my $type_coercion = Moose::Meta::TypeCoercion->new( |
413 | type_coercion_map => $coercion_map, |
414 | type_constraint => $type |
415 | ); |
416 | $type->coercion($type_coercion); |
417 | } |
d9b40005 |
418 | } |
419 | |
420 | ## -------------------------------------------------------- |
f1917f58 |
421 | ## type notation parsing ... |
422 | ## -------------------------------------------------------- |
423 | |
424 | { |
e85d2a5d |
425 | # All I have to say is mugwump++ cause I know |
426 | # do not even have enough regexp-fu to be able |
427 | # to have written this (I can only barely |
f1917f58 |
428 | # understand it as it is) |
e85d2a5d |
429 | # - SL |
430 | |
f1917f58 |
431 | use re "eval"; |
432 | |
3796382a |
433 | my $valid_chars = qr{[\w:]}; |
f1917f58 |
434 | my $type_atom = qr{ $valid_chars+ }; |
435 | |
be722745 |
436 | my $any; |
437 | |
369a74ee |
438 | my $type = qr{ $valid_chars+ (?: \[ \s* (??{$any}) \s* \] )? }x; |
08380fdb |
439 | my $type_capture_parts = qr{ ($valid_chars+) (?: \[ \s* ((??{$any})) \s* \] )? }x; |
369a74ee |
440 | my $type_with_parameter = qr{ $valid_chars+ \[ \s* (??{$any}) \s* \] }x; |
f1917f58 |
441 | |
3796382a |
442 | my $op_union = qr{ \s* \| \s* }x; |
f1917f58 |
443 | my $union = qr{ $type (?: $op_union $type )+ }x; |
444 | |
84a9c64c |
445 | $any = qr{ $type | $union }x; |
f1917f58 |
446 | |
0fbd4b0a |
447 | sub _parse_parameterized_type_constraint { |
be722745 |
448 | { no warnings 'void'; $any; } # force capture of interpolated lexical |
84a9c64c |
449 | $_[0] =~ m{ $type_capture_parts }x; |
450 | return ($1, $2); |
f1917f58 |
451 | } |
452 | |
0fbd4b0a |
453 | sub _detect_parameterized_type_constraint { |
be722745 |
454 | { no warnings 'void'; $any; } # force capture of interpolated lexical |
e85d2a5d |
455 | $_[0] =~ m{ ^ $type_with_parameter $ }x; |
f1917f58 |
456 | } |
457 | |
458 | sub _parse_type_constraint_union { |
be722745 |
459 | { no warnings 'void'; $any; } # force capture of interpolated lexical |
e85d2a5d |
460 | my $given = shift; |
461 | my @rv; |
462 | while ( $given =~ m{ \G (?: $op_union )? ($type) }gcx ) { |
82a5b1a7 |
463 | push @rv => $1; |
e85d2a5d |
464 | } |
465 | (pos($given) eq length($given)) |
c245d69b |
466 | || Moose->throw_error("'$given' didn't parse (parse-pos=" |
e85d2a5d |
467 | . pos($given) |
468 | . " and str-length=" |
469 | . length($given) |
4c0b3599 |
470 | . ")"); |
e85d2a5d |
471 | @rv; |
f1917f58 |
472 | } |
473 | |
474 | sub _detect_type_constraint_union { |
be722745 |
475 | { no warnings 'void'; $any; } # force capture of interpolated lexical |
e85d2a5d |
476 | $_[0] =~ m{^ $type $op_union $type ( $op_union .* )? $}x; |
f1917f58 |
477 | } |
478 | } |
479 | |
480 | ## -------------------------------------------------------- |
d9b40005 |
481 | # define some basic built-in types |
482 | ## -------------------------------------------------------- |
a15dff8d |
483 | |
3cae4250 |
484 | # By making these classes immutable before creating all the types we |
485 | # below, we avoid repeatedly calling the slow MOP-based accessors. |
486 | $_->make_immutable( |
487 | inline_constructor => 1, |
488 | constructor_name => "_new", |
489 | |
490 | # these are Class::MOP accessors, so they need inlining |
491 | inline_accessors => 1 |
492 | ) for grep { $_->is_mutable } |
493 | map { $_->meta } |
494 | qw( |
495 | Moose::Meta::TypeConstraint |
496 | Moose::Meta::TypeConstraint::Union |
497 | Moose::Meta::TypeConstraint::Parameterized |
498 | Moose::Meta::TypeConstraint::Parameterizable |
499 | Moose::Meta::TypeConstraint::Class |
500 | Moose::Meta::TypeConstraint::Role |
501 | Moose::Meta::TypeConstraint::Enum |
502 | Moose::Meta::TypeConstraint::Registry |
503 | ); |
504 | |
f65cb534 |
505 | type 'Any' => where { 1 }; # meta-type including all |
e85d2a5d |
506 | type 'Item' => where { 1 }; # base-type |
a15dff8d |
507 | |
fd542f49 |
508 | subtype 'Undef' => as 'Item' => where { !defined($_) }; |
509 | subtype 'Defined' => as 'Item' => where { defined($_) }; |
a15dff8d |
510 | |
8ecb1fa0 |
511 | subtype 'Bool' |
e85d2a5d |
512 | => as 'Item' |
8ecb1fa0 |
513 | => where { !defined($_) || $_ eq "" || "$_" eq '1' || "$_" eq '0' }; |
5a4c5493 |
514 | |
e85d2a5d |
515 | subtype 'Value' |
516 | => as 'Defined' |
517 | => where { !ref($_) } |
28ffb449 |
518 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Value; |
e85d2a5d |
519 | |
8ecb1fa0 |
520 | subtype 'Ref' |
e85d2a5d |
521 | => as 'Defined' |
522 | => where { ref($_) } |
28ffb449 |
523 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Ref; |
8ecb1fa0 |
524 | |
e85d2a5d |
525 | subtype 'Str' |
526 | => as 'Value' |
527 | => where { 1 } |
28ffb449 |
528 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Str; |
8ecb1fa0 |
529 | |
e85d2a5d |
530 | subtype 'Num' |
531 | => as 'Value' |
532 | => where { Scalar::Util::looks_like_number($_) } |
28ffb449 |
533 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Num; |
e85d2a5d |
534 | |
535 | subtype 'Int' |
536 | => as 'Num' |
8ecb1fa0 |
537 | => where { "$_" =~ /^-?[0-9]+$/ } |
28ffb449 |
538 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Int; |
8ecb1fa0 |
539 | |
28ffb449 |
540 | subtype 'ScalarRef' => as 'Ref' => where { ref($_) eq 'SCALAR' } => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::ScalarRef; |
28ffb449 |
541 | subtype 'CodeRef' => as 'Ref' => where { ref($_) eq 'CODE' } => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::CodeRef; |
542 | subtype 'RegexpRef' => as 'Ref' => where { ref($_) eq 'Regexp' } => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::RegexpRef; |
543 | subtype 'GlobRef' => as 'Ref' => where { ref($_) eq 'GLOB' } => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::GlobRef; |
a15dff8d |
544 | |
0a5bd159 |
545 | # NOTE: |
e85d2a5d |
546 | # scalar filehandles are GLOB refs, |
0a5bd159 |
547 | # but a GLOB ref is not always a filehandle |
e85d2a5d |
548 | subtype 'FileHandle' |
549 | => as 'GlobRef' |
128c601e |
550 | => where { Scalar::Util::openhandle($_) || ( blessed($_) && $_->isa("IO::Handle") ) } |
28ffb449 |
551 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::FileHandle; |
0a5bd159 |
552 | |
e85d2a5d |
553 | # NOTE: |
a15dff8d |
554 | # blessed(qr/.../) returns true,.. how odd |
e85d2a5d |
555 | subtype 'Object' |
556 | => as 'Ref' |
8ecb1fa0 |
557 | => where { blessed($_) && blessed($_) ne 'Regexp' } |
28ffb449 |
558 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Object; |
a15dff8d |
559 | |
e85d2a5d |
560 | subtype 'Role' |
561 | => as 'Object' |
8ecb1fa0 |
562 | => where { $_->can('does') } |
28ffb449 |
563 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Role; |
e85d2a5d |
564 | |
0e0709ea |
565 | my $_class_name_checker = sub { |
0e0709ea |
566 | }; |
567 | |
e85d2a5d |
568 | subtype 'ClassName' |
569 | => as 'Str' |
e151db23 |
570 | => where { Class::MOP::is_class_loaded($_) } |
571 | => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::ClassName; |
02a0fb52 |
572 | |
d9b40005 |
573 | ## -------------------------------------------------------- |
7e4e1ad4 |
574 | # parameterizable types ... |
575 | |
576 | $REGISTRY->add_type_constraint( |
577 | Moose::Meta::TypeConstraint::Parameterizable->new( |
578 | name => 'ArrayRef', |
579 | package_defined_in => __PACKAGE__, |
580 | parent => find_type_constraint('Ref'), |
581 | constraint => sub { ref($_) eq 'ARRAY' }, |
582 | optimized => \&Moose::Util::TypeConstraints::OptimizedConstraints::ArrayRef, |
583 | constraint_generator => sub { |
584 | my $type_parameter = shift; |
dabed765 |
585 | my $check = $type_parameter->_compiled_type_constraint; |
7e4e1ad4 |
586 | return sub { |
587 | foreach my $x (@$_) { |
dabed765 |
588 | ($check->($x)) || return |
7e4e1ad4 |
589 | } 1; |
590 | } |
591 | } |
592 | ) |
593 | ); |
594 | |
595 | $REGISTRY->add_type_constraint( |
596 | Moose::Meta::TypeConstraint::Parameterizable->new( |
597 | name => 'HashRef', |
598 | package_defined_in => __PACKAGE__, |
599 | parent => find_type_constraint('Ref'), |
600 | constraint => sub { ref($_) eq 'HASH' }, |
601 | optimized => \&Moose::Util::TypeConstraints::OptimizedConstraints::HashRef, |
602 | constraint_generator => sub { |
4ab662d6 |
603 | my $type_parameter = shift; |
dabed765 |
604 | my $check = $type_parameter->_compiled_type_constraint; |
7e4e1ad4 |
605 | return sub { |
606 | foreach my $x (values %$_) { |
dabed765 |
607 | ($check->($x)) || return |
7e4e1ad4 |
608 | } 1; |
609 | } |
610 | } |
611 | ) |
612 | ); |
613 | |
614 | $REGISTRY->add_type_constraint( |
615 | Moose::Meta::TypeConstraint::Parameterizable->new( |
616 | name => 'Maybe', |
617 | package_defined_in => __PACKAGE__, |
618 | parent => find_type_constraint('Item'), |
619 | constraint => sub { 1 }, |
620 | constraint_generator => sub { |
4ab662d6 |
621 | my $type_parameter = shift; |
dabed765 |
622 | my $check = $type_parameter->_compiled_type_constraint; |
7e4e1ad4 |
623 | return sub { |
dabed765 |
624 | return 1 if not(defined($_)) || $check->($_); |
7e4e1ad4 |
625 | return; |
626 | } |
627 | } |
628 | ) |
629 | ); |
630 | |
4ab662d6 |
631 | my @PARAMETERIZABLE_TYPES = map { |
632 | $REGISTRY->get_type_constraint($_) |
7e4e1ad4 |
633 | } qw[ArrayRef HashRef Maybe]; |
634 | |
635 | sub get_all_parameterizable_types { @PARAMETERIZABLE_TYPES } |
4ab662d6 |
636 | sub add_parameterizable_type { |
7e4e1ad4 |
637 | my $type = shift; |
638 | (blessed $type && $type->isa('Moose::Meta::TypeConstraint::Parameterizable')) |
c245d69b |
639 | || Moose->throw_error("Type must be a Moose::Meta::TypeConstraint::Parameterizable not $type"); |
7e4e1ad4 |
640 | push @PARAMETERIZABLE_TYPES => $type; |
4ab662d6 |
641 | } |
7e4e1ad4 |
642 | |
643 | ## -------------------------------------------------------- |
d9b40005 |
644 | # end of built-in types ... |
645 | ## -------------------------------------------------------- |
646 | |
943596a6 |
647 | { |
648 | my @BUILTINS = list_all_type_constraints(); |
649 | sub list_all_builtin_type_constraints { @BUILTINS } |
650 | } |
651 | |
a15dff8d |
652 | 1; |
653 | |
654 | __END__ |
655 | |
656 | =pod |
657 | |
658 | =head1 NAME |
659 | |
e522431d |
660 | Moose::Util::TypeConstraints - Type constraint system for Moose |
a15dff8d |
661 | |
662 | =head1 SYNOPSIS |
663 | |
664 | use Moose::Util::TypeConstraints; |
665 | |
2c0cbef7 |
666 | type 'Num' => where { Scalar::Util::looks_like_number($_) }; |
e85d2a5d |
667 | |
668 | subtype 'Natural' |
e606ae5f |
669 | => as 'Int' |
a15dff8d |
670 | => where { $_ > 0 }; |
e85d2a5d |
671 | |
672 | subtype 'NaturalLessThanTen' |
2c0cbef7 |
673 | => as 'Natural' |
79592a54 |
674 | => where { $_ < 10 } |
675 | => message { "This number ($_) is not less than ten!" }; |
e85d2a5d |
676 | |
677 | coerce 'Num' |
2c0cbef7 |
678 | => from 'Str' |
e85d2a5d |
679 | => via { 0+$_ }; |
680 | |
2c0cbef7 |
681 | enum 'RGBColors' => qw(red green blue); |
a15dff8d |
682 | |
683 | =head1 DESCRIPTION |
684 | |
e85d2a5d |
685 | This module provides Moose with the ability to create custom type |
686 | contraints to be used in attribute definition. |
e522431d |
687 | |
6ba6d68c |
688 | =head2 Important Caveat |
689 | |
e85d2a5d |
690 | This is B<NOT> a type system for Perl 5. These are type constraints, |
691 | and they are not used by Moose unless you tell it to. No type |
692 | inference is performed, expression are not typed, etc. etc. etc. |
6ba6d68c |
693 | |
e85d2a5d |
694 | This is simply a means of creating small constraint functions which |
e606ae5f |
695 | can be used to simplify your own type-checking code, with the added |
004222dc |
696 | side benefit of making your intentions clearer through self-documentation. |
6ba6d68c |
697 | |
2c0cbef7 |
698 | =head2 Slightly Less Important Caveat |
699 | |
004222dc |
700 | It is B<always> a good idea to quote your type and subtype names. |
701 | |
e85d2a5d |
702 | This is to prevent perl from trying to execute the call as an indirect |
2c0cbef7 |
703 | object call. This issue only seems to come up when you have a subtype |
e85d2a5d |
704 | the same name as a valid class, but when the issue does arise it tends |
705 | to be quite annoying to debug. |
2c0cbef7 |
706 | |
707 | So for instance, this: |
e85d2a5d |
708 | |
2c0cbef7 |
709 | subtype DateTime => as Object => where { $_->isa('DateTime') }; |
710 | |
711 | will I<Just Work>, while this: |
712 | |
713 | use DateTime; |
714 | subtype DateTime => as Object => where { $_->isa('DateTime') }; |
715 | |
e85d2a5d |
716 | will fail silently and cause many headaches. The simple way to solve |
717 | this, as well as future proof your subtypes from classes which have |
2c0cbef7 |
718 | yet to have been created yet, is to simply do this: |
719 | |
720 | use DateTime; |
d44714be |
721 | subtype 'DateTime' => as 'Object' => where { $_->isa('DateTime') }; |
2c0cbef7 |
722 | |
6ba6d68c |
723 | =head2 Default Type Constraints |
e522431d |
724 | |
e606ae5f |
725 | This module also provides a simple hierarchy for Perl 5 types, here is |
004222dc |
726 | that hierarchy represented visually. |
e522431d |
727 | |
728 | Any |
e85d2a5d |
729 | Item |
5a4c5493 |
730 | Bool |
7e4e1ad4 |
731 | Maybe[`a] |
f65cb534 |
732 | Undef |
733 | Defined |
5a4c5493 |
734 | Value |
735 | Num |
736 | Int |
737 | Str |
9af1d28b |
738 | ClassName |
5a4c5493 |
739 | Ref |
740 | ScalarRef |
7e4e1ad4 |
741 | ArrayRef[`a] |
742 | HashRef[`a] |
5a4c5493 |
743 | CodeRef |
744 | RegexpRef |
3f7376b0 |
745 | GlobRef |
0a5bd159 |
746 | FileHandle |
e85d2a5d |
747 | Object |
5a4c5493 |
748 | Role |
e522431d |
749 | |
4ab662d6 |
750 | B<NOTE:> Any type followed by a type parameter C<[`a]> can be |
7e4e1ad4 |
751 | parameterized, this means you can say: |
752 | |
757e07ef |
753 | ArrayRef[Int] # an array of integers |
7e4e1ad4 |
754 | HashRef[CodeRef] # a hash of str to CODE ref mappings |
755 | Maybe[Str] # value may be a string, may be undefined |
756 | |
e606ae5f |
757 | B<NOTE:> Unless you parameterize a type, then it is invalid to |
758 | include the square brackets. I.e. C<ArrayRef[]> will be |
759 | literally interpreted as a type name. |
760 | |
4ab662d6 |
761 | B<NOTE:> The C<Undef> type constraint for the most part works |
762 | correctly now, but edge cases may still exist, please use it |
7e4e1ad4 |
763 | sparringly. |
703e92fb |
764 | |
7e4e1ad4 |
765 | B<NOTE:> The C<ClassName> type constraint does a complex package |
4ab662d6 |
766 | existence check. This means that your class B<must> be loaded for |
767 | this type constraint to pass. I know this is not ideal for all, |
7e4e1ad4 |
768 | but it is a saner restriction than most others. |
9af1d28b |
769 | |
e606ae5f |
770 | =head2 Type Constraint Naming |
004222dc |
771 | |
e606ae5f |
772 | Since the types created by this module are global, it is suggested |
773 | that you namespace your types just as you would namespace your |
004222dc |
774 | modules. So instead of creating a I<Color> type for your B<My::Graphics> |
775 | module, you would call the type I<My::Graphics::Color> instead. |
776 | |
703e92fb |
777 | =head2 Use with Other Constraint Modules |
778 | |
e85d2a5d |
779 | This module should play fairly nicely with other constraint |
780 | modules with only some slight tweaking. The C<where> clause |
703e92fb |
781 | in types is expected to be a C<CODE> reference which checks |
004222dc |
782 | it's first argument and returns a boolean. Since most constraint |
e85d2a5d |
783 | modules work in a similar way, it should be simple to adapt |
703e92fb |
784 | them to work with Moose. |
785 | |
e85d2a5d |
786 | For instance, this is how you could use it with |
787 | L<Declare::Constraints::Simple> to declare a completely new type. |
703e92fb |
788 | |
e85d2a5d |
789 | type 'HashOfArrayOfObjects' |
703e92fb |
790 | => IsHashRef( |
791 | -keys => HasLength, |
792 | -values => IsArrayRef( IsObject )); |
793 | |
e606ae5f |
794 | For more examples see the F<t/200_examples/204_example_w_DCS.t> |
004222dc |
795 | test file. |
703e92fb |
796 | |
e85d2a5d |
797 | Here is an example of using L<Test::Deep> and it's non-test |
798 | related C<eq_deeply> function. |
703e92fb |
799 | |
e85d2a5d |
800 | type 'ArrayOfHashOfBarsAndRandomNumbers' |
703e92fb |
801 | => where { |
e85d2a5d |
802 | eq_deeply($_, |
703e92fb |
803 | array_each(subhashof({ |
804 | bar => isa('Bar'), |
805 | random_number => ignore() |
e85d2a5d |
806 | }))) |
703e92fb |
807 | }; |
808 | |
e606ae5f |
809 | For a complete example see the |
004222dc |
810 | F<t/200_examples/205_example_w_TestDeep.t> test file. |
e85d2a5d |
811 | |
a15dff8d |
812 | =head1 FUNCTIONS |
813 | |
814 | =head2 Type Constraint Constructors |
815 | |
e85d2a5d |
816 | The following functions are used to create type constraints. |
817 | They will then register the type constraints in a global store |
818 | where Moose can get to them if it needs to. |
a15dff8d |
819 | |
25f2c3fc |
820 | See the L<SYNOPSIS> for an example of how to use these. |
a15dff8d |
821 | |
6ba6d68c |
822 | =over 4 |
a15dff8d |
823 | |
6ba6d68c |
824 | =item B<type ($name, $where_clause)> |
a15dff8d |
825 | |
e85d2a5d |
826 | This creates a base type, which has no parent. |
a15dff8d |
827 | |
79592a54 |
828 | =item B<subtype ($name, $parent, $where_clause, ?$message)> |
182134e8 |
829 | |
e85d2a5d |
830 | This creates a named subtype. |
d6e2d9a1 |
831 | |
79592a54 |
832 | =item B<subtype ($parent, $where_clause, ?$message)> |
182134e8 |
833 | |
e85d2a5d |
834 | This creates an unnamed subtype and will return the type |
835 | constraint meta-object, which will be an instance of |
836 | L<Moose::Meta::TypeConstraint>. |
a15dff8d |
837 | |
620db045 |
838 | =item B<class_type ($class, ?$options)> |
3fef8ce8 |
839 | |
840 | Creates a type constraint with the name C<$class> and the metaclass |
841 | L<Moose::Meta::TypeConstraint::Class>. |
842 | |
620db045 |
843 | =item B<role_type ($role, ?$options)> |
844 | |
845 | Creates a type constraint with the name C<$role> and the metaclass |
846 | L<Moose::Meta::TypeConstraint::Role>. |
847 | |
fcec2383 |
848 | =item B<enum ($name, @values)> |
849 | |
e85d2a5d |
850 | This will create a basic subtype for a given set of strings. |
851 | The resulting constraint will be a subtype of C<Str> and |
4ce56d04 |
852 | will match any of the items in C<@values>. It is case sensitive. |
853 | See the L<SYNOPSIS> for a simple example. |
2c0cbef7 |
854 | |
e85d2a5d |
855 | B<NOTE:> This is not a true proper enum type, it is simple |
2c0cbef7 |
856 | a convient constraint builder. |
857 | |
9f4334a1 |
858 | =item B<enum (\@values)> |
859 | |
4ab662d6 |
860 | If passed an ARRAY reference instead of the C<$name>, C<@values> pair, |
9f4334a1 |
861 | this will create an unnamed enum. This can then be used in an attribute |
862 | definition like so: |
863 | |
864 | has 'sort_order' => ( |
865 | is => 'ro', |
4ab662d6 |
866 | isa => enum([qw[ ascending descending ]]), |
9f4334a1 |
867 | ); |
868 | |
6ba6d68c |
869 | =item B<as> |
a15dff8d |
870 | |
6ba6d68c |
871 | This is just sugar for the type constraint construction syntax. |
a15dff8d |
872 | |
6ba6d68c |
873 | =item B<where> |
a15dff8d |
874 | |
6ba6d68c |
875 | This is just sugar for the type constraint construction syntax. |
76d37e5a |
876 | |
e606ae5f |
877 | Takes a block/code ref as an argument. When the type constraint is |
878 | tested, the supplied code is run with the value to be tested in |
879 | $_. This block should return true or false to indicate whether or not |
880 | the constraint check passed. |
881 | |
76d37e5a |
882 | =item B<message> |
883 | |
884 | This is just sugar for the type constraint construction syntax. |
a15dff8d |
885 | |
e606ae5f |
886 | Takes a block/code ref as an argument. When the type constraint fails, |
887 | then the code block is run (with the value provided in $_). This code |
888 | ref should return a string, which will be used in the text of the |
889 | exception thrown. |
890 | |
8ecb1fa0 |
891 | =item B<optimize_as> |
892 | |
e85d2a5d |
893 | This can be used to define a "hand optimized" version of your |
d44714be |
894 | type constraint which can be used to avoid traversing a subtype |
e85d2a5d |
895 | constraint heirarchy. |
d44714be |
896 | |
e85d2a5d |
897 | B<NOTE:> You should only use this if you know what you are doing, |
898 | all the built in types use this, so your subtypes (assuming they |
d44714be |
899 | are shallow) will not likely need to use this. |
900 | |
6ba6d68c |
901 | =back |
a15dff8d |
902 | |
6ba6d68c |
903 | =head2 Type Coercion Constructors |
a15dff8d |
904 | |
e85d2a5d |
905 | Type constraints can also contain type coercions as well. If you |
906 | ask your accessor to coerce, then Moose will run the type-coercion |
907 | code first, followed by the type constraint check. This feature |
908 | should be used carefully as it is very powerful and could easily |
587ae0d2 |
909 | take off a limb if you are not careful. |
a15dff8d |
910 | |
25f2c3fc |
911 | See the L<SYNOPSIS> for an example of how to use these. |
a15dff8d |
912 | |
6ba6d68c |
913 | =over 4 |
a15dff8d |
914 | |
6ba6d68c |
915 | =item B<coerce> |
a15dff8d |
916 | |
6ba6d68c |
917 | =item B<from> |
a15dff8d |
918 | |
6ba6d68c |
919 | This is just sugar for the type coercion construction syntax. |
920 | |
921 | =item B<via> |
a15dff8d |
922 | |
6ba6d68c |
923 | This is just sugar for the type coercion construction syntax. |
a15dff8d |
924 | |
925 | =back |
926 | |
004222dc |
927 | =head2 Type Constraint Construction & Locating |
928 | |
929 | =over 4 |
930 | |
eb4c4e82 |
931 | =item B<normalize_type_constraint_name ($type_constraint_name)> |
932 | |
933 | Given a string that is expected to match a type constraint, will normalize the |
934 | string so that extra whitespace and newlines are removed. |
935 | |
004222dc |
936 | =item B<create_type_constraint_union ($pipe_seperated_types | @type_constraint_names)> |
937 | |
938 | Given string with C<$pipe_seperated_types> or a list of C<@type_constraint_names>, |
939 | this will return a L<Moose::Meta::TypeConstraint::Union> instance. |
940 | |
941 | =item B<create_parameterized_type_constraint ($type_name)> |
942 | |
943 | Given a C<$type_name> in the form of: |
944 | |
945 | BaseType[ContainerType] |
946 | |
947 | this will extract the base type and container type and build an instance of |
948 | L<Moose::Meta::TypeConstraint::Parameterized> for it. |
949 | |
620db045 |
950 | =item B<create_class_type_constraint ($class, ?$options)> |
004222dc |
951 | |
952 | Given a class name it will create a new L<Moose::Meta::TypeConstraint::Class> |
953 | object for that class name. |
954 | |
620db045 |
955 | =item B<create_role_type_constraint ($role, ?$options)> |
956 | |
957 | Given a role name it will create a new L<Moose::Meta::TypeConstraint::Role> |
958 | object for that role name. |
959 | |
dabed765 |
960 | =item B<create_enum_type_constraint ($name, $values)> |
961 | |
620db045 |
962 | =item B<find_or_parse_type_constraint ($type_name)> |
004222dc |
963 | |
964 | This will attempt to find or create a type constraint given the a C<$type_name>. |
965 | If it cannot find it in the registry, it will see if it should be a union or |
620db045 |
966 | container type an create one if appropriate |
967 | |
968 | =item B<find_or_create_type_constraint ($type_name, ?$options_for_anon_type)> |
969 | |
970 | This function will first call C<find_or_parse_type_constraint> with the type name. |
971 | |
972 | If no type is found or created, but C<$options_for_anon_type> are provided, it |
973 | will create the corresponding type. |
974 | |
975 | This was used by the C<does> and C<isa> parameters to L<Moose::Meta::Attribute> |
976 | and are now superseded by C<find_or_create_isa_type_constraint> and |
977 | C<find_or_create_does_type_constraint>. |
978 | |
979 | =item B<find_or_create_isa_type_constraint ($type_name)> |
980 | |
981 | =item B<find_or_create_does_type_constraint ($type_name)> |
982 | |
ae55929d |
983 | Attempts to parse the type name using C<find_or_parse_type_constraint> and if |
620db045 |
984 | no appropriate constraint is found will create a new anonymous one. |
985 | |
986 | The C<isa> variant will use C<create_class_type_constraint> and the C<does> |
987 | variant will use C<create_role_type_constraint>. |
004222dc |
988 | |
989 | =item B<find_type_constraint ($type_name)> |
990 | |
991 | This function can be used to locate a specific type constraint |
992 | meta-object, of the class L<Moose::Meta::TypeConstraint> or a |
993 | derivative. What you do with it from there is up to you :) |
994 | |
995 | =item B<register_type_constraint ($type_object)> |
996 | |
997 | This function will register a named type constraint with the type registry. |
998 | |
999 | =item B<get_type_constraint_registry> |
1000 | |
1001 | Fetch the L<Moose::Meta::TypeConstraint::Registry> object which |
1002 | keeps track of all type constraints. |
1003 | |
1004 | =item B<list_all_type_constraints> |
1005 | |
1006 | This will return a list of type constraint names, you can then |
1007 | fetch them using C<find_type_constraint ($type_name)> if you |
1008 | want to. |
1009 | |
1010 | =item B<list_all_builtin_type_constraints> |
1011 | |
1012 | This will return a list of builtin type constraints, meaning, |
1013 | those which are defined in this module. See the section |
1014 | labeled L<Default Type Constraints> for a complete list. |
1015 | |
1016 | =item B<export_type_constraints_as_functions> |
1017 | |
1018 | This will export all the current type constraints as functions |
1019 | into the caller's namespace. Right now, this is mostly used for |
1020 | testing, but it might prove useful to others. |
1021 | |
1022 | =item B<get_all_parameterizable_types> |
1023 | |
1024 | This returns all the parameterizable types that have been registered. |
1025 | |
1026 | =item B<add_parameterizable_type ($type)> |
1027 | |
1028 | Adds C<$type> to the list of parameterizable types |
1029 | |
1030 | =back |
1031 | |
571dd39f |
1032 | =head2 Namespace Management |
1033 | |
1034 | =over 4 |
1035 | |
1036 | =item B<unimport> |
1037 | |
e85d2a5d |
1038 | This will remove all the type constraint keywords from the |
571dd39f |
1039 | calling class namespace. |
1040 | |
1041 | =back |
1042 | |
a15dff8d |
1043 | =head1 BUGS |
1044 | |
e85d2a5d |
1045 | All complex software has bugs lurking in it, and this module is no |
a15dff8d |
1046 | exception. If you find a bug please either email me, or add the bug |
1047 | to cpan-RT. |
1048 | |
a15dff8d |
1049 | =head1 AUTHOR |
1050 | |
1051 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
1052 | |
1053 | =head1 COPYRIGHT AND LICENSE |
1054 | |
778db3ac |
1055 | Copyright 2006-2008 by Infinity Interactive, Inc. |
a15dff8d |
1056 | |
1057 | L<http://www.iinteractive.com> |
1058 | |
1059 | This library is free software; you can redistribute it and/or modify |
e85d2a5d |
1060 | it under the same terms as Perl itself. |
a15dff8d |
1061 | |
81dc201f |
1062 | =cut |