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1 | =pod |
2 | |
3 | =head1 NAME |
4 | |
5 | Moose::Manual::Delta - Important Changes in Moose |
6 | |
7 | =head1 DESCRIPTION |
8 | |
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9 | This documents any important or noteworthy changes in Moose, with a |
10 | focus on backwards. This does duplicate data from the F<Changes> file, |
11 | but aims to provide more details and when possible workarounds. |
12 | |
13 | Besides helping keep up with changes, you can also use this document |
14 | for finding the lowest version of Moose that supported a given |
15 | feature. If you encounter a problem and have a solution but don't see |
16 | it documented here, or think we missed an important feature, please |
17 | send us a patch. |
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18 | |
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19 | =head1 Version 0.89 |
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20 | |
21 | L<Moose::AttributeHelpers> has been moved into the Moose core from |
22 | L<MooseX::AttributeHelpers>. Major changes include: |
23 | |
24 | =over |
25 | |
26 | =item C<traits>, not C<metaclass> |
27 | |
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28 | Method providers are only available via traits. |
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29 | |
30 | =item C<handles>, not C<provides> or C<curries> |
31 | |
93ced2bd |
32 | The C<provides> syntax was like core Moose C<< handles => HASHREF >> |
33 | syntax, but with the keys and values reversed. This was confusing, |
34 | and AttributeHelpers now uses C<< handles => HASHREF >> in a way that |
35 | should be intuitive to anyone already familiar with how it is used for |
36 | other attributes. |
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37 | |
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38 | The C<curries> functionality provided by AttributeHelpers has been |
39 | generalized to apply to all cases of C<< handles => HASHREF >>, though |
40 | not every piece of functionality has been ported (currying with a |
41 | CODEREF is not supported). |
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42 | |
43 | =back |
44 | |
45 | See L<Moose::AttributeHelpers> for the new documentation. |
46 | |
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47 | C<< use Moose -metaclass => 'Foo' >> now does alias resolution, just like |
48 | C<-traits> (and the C<metaclass> and C<traits> options to C<has>). |
49 | |
27f2f43f |
50 | Added two functions C<meta_class_alias> and C<meta_attribute_alias> to |
51 | L<Moose::Util>, to simplify aliasing metaclasses and metatraits. This is |
52 | a wrapper around the old |
53 | |
54 | package Moose::Meta::Class::Custom::Trait::FooTrait; |
55 | sub register_implementation { 'My::Meta::Trait' } |
56 | |
57 | way of doing this. |
58 | |
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59 | =head1 Version 0.84 |
60 | |
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61 | When an attribute generates I<no> accessors, we now warn. This is to help |
62 | users who forget the C<is> option. If you really do not want any accessors, |
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63 | you can use C<< is => 'bare' >>. You can maintain back compat with older |
64 | versions of Moose by using something like: |
65 | |
66 | ($Moose::VERSION >= 0.84 ? is => 'bare' : ()) |
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67 | |
68 | When an accessor overwrites an existing method, we now warn. To work around |
69 | this warning (if you really must have this behavior), you can explicitly |
70 | remove the method before creating it as an accessor: |
71 | |
72 | sub foo {} |
73 | |
74 | __PACKAGE__->meta->remove_method('foo'); |
75 | |
76 | has foo => ( |
77 | is => 'ro', |
78 | ); |
79 | |
80 | When an unknown option is passed to C<has>, we now warn. You can silence |
81 | the warning by fixing your code. :) |
82 | |
4831e2de |
83 | The C<Role> type has been deprecated. On its own, it was useless, |
84 | since it just checked C<< $object->can('does') >>. If you were using |
85 | it as a parent type, just call C<role_type('Role::Name')> to create an |
86 | appropriate type instead. |
87 | |
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88 | =head1 Version 0.78 |
89 | |
90 | C<use Moose::Exporter;> now imports C<strict> and C<warnings> into packages |
91 | that use it. |
92 | |
c3fdacda |
93 | =head1 Version 0.77 |
94 | |
95 | C<DEMOLISHALL> and C<DEMOLISH> now receive an argument indicating whether or |
96 | not we are in global destruction. |
97 | |
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98 | =head1 Version 0.76 |
99 | |
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100 | Type constraints no longer run coercions for a value that already matches the |
101 | constraint. This may affect some (arguably buggy) edge case coercions that |
102 | rely on side effects in the C<via> clause. |
103 | |
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104 | =head1 Version 0.75 |
105 | |
106 | L<Moose::Exporter> now accepts the C<-metaclass> option for easily |
107 | overriding the metaclass (without L<metaclass>). This works for classes |
108 | and roles. |
109 | |
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110 | =head1 Version 0.74 |
111 | |
85cf0647 |
112 | Added a C<duck_type> sugar function to L<Moose::Util::TypeConstraints> |
113 | to make integration with non-Moose classes easier. It simply checks if |
114 | C<< $obj->can() >> a list of methods. |
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115 | |
612fd754 |
116 | A number of methods (mostly inherited from L<Class::MOP>) have been |
117 | renamed with a leading underscore to indicate their internal-ness. The |
118 | old method names will still work for a while, but will warn that the |
119 | method has been renamed. In a few cases, the method will be removed |
120 | entirely in the future. This may affect MooseX authors who were using |
121 | these methods. |
122 | |
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123 | =head1 Version 0.73 |
124 | |
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125 | Calling C<subtype> with a name as the only argument now throws an |
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126 | exception. If you want an anonymous subtype do: |
127 | |
128 | my $subtype = subtype as 'Foo'; |
129 | |
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130 | This is related to the changes in version 0.71_01. |
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131 | |
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132 | The C<is_needed> method in L<Moose::Meta::Method::Destructor> is now |
133 | only usable as a class method. Previously, it worked as a class or |
134 | object method, with a different internal implementation for each |
135 | version. |
136 | |
137 | The internals of making a class immutable changed a lot in Class::MOP |
138 | 0.78_02, and Moose's internals have changed along with it. The |
139 | external C<< $metaclass->make_immutable >> method still works the same |
140 | way. |
141 | |
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142 | =head1 Version 0.72 |
143 | |
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144 | A mutable class accepted C<< Foo->new(undef) >> without complaint, |
145 | while an immutable class would blow up with an unhelpful error. Now, |
146 | in both cases we throw a helpful error instead. |
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147 | |
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148 | This "feature" was originally added to allow for cases such as this: |
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149 | |
150 | my $args; |
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151 | |
152 | if ( something() ) { |
153 | $args = {...}; |
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154 | } |
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155 | |
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156 | return My::Class->new($args); |
157 | |
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158 | But we decided this is a bad idea and a little too magical, because it |
159 | can easily mask real errors. |
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160 | |
161 | =head1 Version 0.71_01 |
162 | |
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163 | Calling C<type> or C<subtype> without the sugar helpers (C<as>, |
164 | C<where>, C<message>) is now deprecated. |
165 | |
166 | As a side effect, this meant we ended up using Perl prototypes on |
167 | C<as>, and code like this will no longer work: |
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168 | |
169 | use Moose::Util::TypeConstraints; |
170 | use Declare::Constraints::Simple -All; |
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171 | |
172 | subtype 'ArrayOfInts' |
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173 | => as 'ArrayRef' |
174 | => IsArrayRef(IsInt); |
175 | |
176 | Instead it must be changed to this: |
177 | |
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178 | subtype( |
179 | 'ArrayOfInts' => { |
180 | as => 'ArrayRef', |
181 | where => IsArrayRef(IsInt) |
182 | } |
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183 | ); |
184 | |
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185 | If you want to maintain backwards compat with older versions of Moose, |
186 | you must explicitly test Moose's C<VERSION>: |
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187 | |
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188 | if ( Moose->VERSION < 0.71_01 ) { |
189 | subtype 'ArrayOfInts' |
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190 | => as 'ArrayRef' |
191 | => IsArrayRef(IsInt); |
192 | } |
193 | else { |
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194 | subtype( |
195 | 'ArrayOfInts' => { |
196 | as => 'ArrayRef', |
197 | where => IsArrayRef(IsInt) |
198 | } |
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199 | ); |
200 | } |
201 | |
202 | =head1 Version 0.70 |
203 | |
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204 | We no longer pass the meta-attribute object as a final argument to |
205 | triggers. This actually changed for inlined code a while back, but the |
206 | non-inlined version and the docs were still out of date. |
207 | |
208 | If by some chance you actually used this feature, the workaround is |
209 | simple. You fetch the attribute object from out of the C<$self> |
210 | that is passed as the first argument to trigger, like so: |
211 | |
212 | has 'foo' => ( |
213 | is => 'ro', |
214 | isa => 'Any', |
215 | trigger => sub { |
216 | my ( $self, $value ) = @_; |
217 | my $attr = $self->meta->find_attribute_by_name('foo'); |
218 | |
219 | # ... |
220 | } |
221 | ); |
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222 | |
223 | =head1 Version 0.66 |
224 | |
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225 | If you created a subtype and passed a parent that Moose didn't know |
226 | about, it simply ignored the parent. Now it automatically creates the |
227 | parent as a class type. This may not be what you want, but is less |
228 | broken than before. |
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229 | |
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230 | You could declare a name with subtype such as "Foo!Bar". Moose would |
231 | accept this allowed, but if you used it in a parameterized type such |
232 | as "ArrayRef[Foo!Bar]" it wouldn't work. We now do some vetting on |
233 | names created via the sugar functions, so that they can only contain |
234 | alphanumerics, ":", and ".". |
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235 | |
236 | =head1 Version 0.65 |
237 | |
238 | Methods created via an attribute can now fulfill a C<requires> |
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239 | declaration for a role. Honestly we don't know why Stevan didn't make |
240 | this work originally, he was just insane or something. |
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241 | |
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242 | Stack traces from inlined code will now report the line and file as |
243 | being in your class, as opposed to in Moose guts. |
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244 | |
245 | =head1 Version 0.62_02 |
246 | |
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247 | When a class does not provide all of a role's required methods, the |
248 | error thrown now mentions all of the missing methods, as opposed to |
249 | just the first missing method. |
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250 | |
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251 | Moose will no longer inline a constructor for your class unless it |
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252 | inherits its constructor from Moose::Object, and will warn when it |
253 | doesn't inline. If you want to force inlining anyway, pass |
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254 | C<< replace_constructor => 1 >> to C<make_immutable>. |
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255 | |
256 | If you want to get rid of the warning, pass C<< inline_constructor => |
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257 | 0 >>. |
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258 | |
259 | =head1 Version 0.62 |
260 | |
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261 | Removed the (deprecated) C<make_immutable> keyword. |
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262 | |
263 | Removing an attribute from a class now also removes delegation |
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264 | (C<handles>) methods installed for that attribute. This is correct |
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265 | behavior, but if you were wrongly relying on it you might get bit. |
266 | |
267 | =head1 Version 0.58 |
268 | |
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269 | Roles now add methods by calling C<add_method>, not |
270 | C<alias_method>. They make sure to always provide a method object, |
271 | which will be cloned internally. This means that it is now possible to |
272 | track the source of a method provided by a role, and even follow its |
273 | history through intermediate roles. This means that methods added by |
274 | a role now show up when looking at a class's method list/map. |
275 | |
276 | Parameter and Union args are now sorted, this makes Int|Str the same |
277 | constraint as Str|Int. Also, incoming type constraint strings are |
278 | normalized to remove all whitespace differences. This is mostly for |
279 | internals and should not affect outside code. |
280 | |
281 | L<Moose::Exporter> will no longer remove a subroutine that the |
282 | exporting package re-exports. Moose re-exports the Carp::confess |
283 | function, among others. The reasoning is that we cannot know whether |
284 | you have also explicitly imported those functions for your own use, so |
285 | we err on the safe side and always keep them. |
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286 | |
287 | =head1 Version 0.56 |
288 | |
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289 | C<Moose::init_meta> should now be called as a method. |
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290 | |
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291 | New modules for extension writers, L<Moose::Exporter> and |
292 | L<Moose::Util::MetaRole>. |
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293 | |
294 | =head1 Version 0.55_01 |
295 | |
296 | Implemented metaclass traits (and wrote a recipe for it): |
297 | |
298 | use Moose -traits => 'Foo' |
299 | |
300 | This should make writing small Moose extensions a little |
301 | easier. |
302 | |
303 | =head1 Version 0.55 |
304 | |
305 | Fixed C<coerce> to accept anon types just like C<subtype> can. |
306 | So that you can do: |
307 | |
308 | coerce $some_anon_type => from 'Str' => via { ... }; |
309 | |
310 | =head1 Version 0.51 |
311 | |
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312 | Added C<BUILDARGS>, a new step in C<< Moose::Object->new() >>. |
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313 | |
314 | =head1 Version 0.49 |
315 | |
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316 | Fixed how the C<< is => (ro|rw) >> works with custom defined |
317 | C<reader>, C<writer> and C<accessor> options. See the below table for |
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318 | details: |
319 | |
320 | is => ro, writer => _foo # turns into (reader => foo, writer => _foo) |
321 | is => rw, writer => _foo # turns into (reader => foo, writer => _foo) |
322 | is => rw, accessor => _foo # turns into (accessor => _foo) |
323 | is => ro, accessor => _foo # error, accesor is rw |
324 | |
325 | =head1 Version 0.45 |
326 | |
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327 | The C<before/around/after> method modifiers now support regexp |
328 | matching of method names. NOTE: this only works for classes, it is |
329 | currently not supported in roles, but, ... patches welcome. |
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330 | |
0f13f53c |
331 | The C<has> keyword for roles now accepts the same array ref form that |
332 | L<Moose>.pm does for classes. |
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333 | |
0f13f53c |
334 | A trigger on a read-only attribute is no longer an error, as it's |
335 | useful to trigger off of the constructor. |
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336 | |
0f13f53c |
337 | Subtypes of parameterizable types now are parameterizable types |
338 | themselves. |
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339 | |
340 | =head1 Version 0.44 |
341 | |
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342 | Fixed issue where C<DEMOLISHALL> was eating the value in C<$@>, and so |
343 | not working correctly. It still kind of eats them, but so does vanilla |
344 | perl. |
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345 | |
346 | =head1 Version 0.41 |
347 | |
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348 | Inherited attributes may now be extended without restriction on the |
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349 | type ('isa', 'does'). |
350 | |
0f13f53c |
351 | The entire set of Moose::Meta::TypeConstraint::* classes were |
352 | refactored in this release. If you were relying on their internals you |
353 | should test your code carefully. |
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354 | |
355 | =head1 Version 0.40 |
356 | |
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357 | Documenting the use of '+name' with attributes that come from recently |
358 | composed roles. It makes sense, people are using it, and so why not |
359 | just officially support it. |
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360 | |
0f13f53c |
361 | The C<< Moose::Meta::Class->create >> method now supports roles. |
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362 | |
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363 | It is now possible to make anonymous enum types by passing C<enum> an |
364 | array reference instead of the C<< enum $name => @values >>. |
600f7f85 |
365 | |
366 | =head1 Version 0.37 |
367 | |
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368 | Added the C<make_immutable> keyword as a shortcut to calling |
369 | C<make_immutable> on the meta object. This eventually got removed! |
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370 | |
0f13f53c |
371 | Made C<< init_arg => undef >> work in Moose. This means "do not accept |
600f7f85 |
372 | a constructor parameter for this attribute". |
373 | |
0f13f53c |
374 | Type errors now use the provided message. Prior to this release they |
375 | didn't. |
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376 | |
377 | =head1 Version 0.34 |
378 | |
379 | Moose is now a postmodern object system :) |
380 | |
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381 | The Role system was completely refactored. It is 100% backwards |
382 | compat, but the internals were totally changed. If you relied on the |
383 | internals then you are advised to test carefully. |
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384 | |
385 | Added method exclusion and aliasing for Roles in this release. |
386 | |
0f13f53c |
387 | Added the L<Moose::Util::TypeConstraints::OptimizedConstraints> |
388 | module. |
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389 | |
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390 | Passing a list of values to an accessor (which is only expecting one |
391 | value) used to be silently ignored, now it throws an error. |
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392 | |
393 | =head1 Version 0.26 |
394 | |
0f13f53c |
395 | Added parameterized types and did a pretty heavy refactoring of the |
396 | type constraint system. |
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397 | |
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398 | Better framework extendability and better support for "making your own |
399 | Moose". |
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400 | |
401 | =head1 Version 0.25 or before |
402 | |
0f13f53c |
403 | Honestly, you shouldn't be using versions of Moose that are this old, |
404 | so many bug fixes and speed improvements have been made you would be |
405 | crazy to not upgrade. |
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406 | |
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407 | Also, I am tired of going through the Changelog so I am stopping here, |
408 | if anyone would like to continue this please feel free. |
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409 | |
410 | =head1 AUTHOR |
411 | |
412 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
413 | |
414 | =head1 COPYRIGHT AND LICENSE |
415 | |
416 | Copyright 2009 by Infinity Interactive, Inc. |
417 | |
418 | L<http://www.iinteractive.com> |
419 | |
420 | This library is free software; you can redistribute it and/or modify |
421 | it under the same terms as Perl itself. |
422 | |
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423 | =cut |