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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 0.74 |
20 | |
21 | Added a C<duck_type> keyword to L<Moose::Util::TypeConstraints> to make |
22 | integration with non-Moose classes easier. It simply checks if $obj->can() |
23 | a list of methods. |
24 | |
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25 | =head1 Version 0.73 |
26 | |
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27 | Calling C<subtype> with a name as the only argument now throws an |
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28 | exception. If you want an anonymous subtype do: |
29 | |
30 | my $subtype = subtype as 'Foo'; |
31 | |
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32 | This is related to the changes in version 0.71_01. |
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33 | |
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34 | The C<is_needed> method in L<Moose::Meta::Method::Destructor> is now |
35 | only usable as a class method. Previously, it worked as a class or |
36 | object method, with a different internal implementation for each |
37 | version. |
38 | |
39 | The internals of making a class immutable changed a lot in Class::MOP |
40 | 0.78_02, and Moose's internals have changed along with it. The |
41 | external C<< $metaclass->make_immutable >> method still works the same |
42 | way. |
43 | |
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44 | =head1 Version 0.72 |
45 | |
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46 | A mutable class accepted C<< Foo->new(undef) >> without complaint, |
47 | while an immutable class would blow up with an unhelpful error. Now, |
48 | in both cases we throw a helpful error instead. |
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49 | |
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50 | This "feature" was originally added to allow for cases such as this: |
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51 | |
52 | my $args; |
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53 | |
54 | if ( something() ) { |
55 | $args = {...}; |
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56 | } |
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57 | |
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58 | return My::Class->new($args); |
59 | |
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60 | But we decided this is a bad idea and a little too magical, because it |
61 | can easily mask real errors. |
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62 | |
63 | =head1 Version 0.71_01 |
64 | |
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65 | Calling C<type> or C<subtype> without the sugar helpers (C<as>, |
66 | C<where>, C<message>) is now deprecated. |
67 | |
68 | As a side effect, this meant we ended up using Perl prototypes on |
69 | C<as>, and code like this will no longer work: |
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70 | |
71 | use Moose::Util::TypeConstraints; |
72 | use Declare::Constraints::Simple -All; |
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73 | |
74 | subtype 'ArrayOfInts' |
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75 | => as 'ArrayRef' |
76 | => IsArrayRef(IsInt); |
77 | |
78 | Instead it must be changed to this: |
79 | |
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80 | subtype( |
81 | 'ArrayOfInts' => { |
82 | as => 'ArrayRef', |
83 | where => IsArrayRef(IsInt) |
84 | } |
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85 | ); |
86 | |
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87 | If you want to maintain backwards compat with older versions of Moose, |
88 | you must explicitly test Moose's C<VERSION>: |
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89 | |
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90 | if ( Moose->VERSION < 0.71_01 ) { |
91 | subtype 'ArrayOfInts' |
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92 | => as 'ArrayRef' |
93 | => IsArrayRef(IsInt); |
94 | } |
95 | else { |
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96 | subtype( |
97 | 'ArrayOfInts' => { |
98 | as => 'ArrayRef', |
99 | where => IsArrayRef(IsInt) |
100 | } |
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101 | ); |
102 | } |
103 | |
104 | =head1 Version 0.70 |
105 | |
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106 | We no longer pass the meta-attribute object as a final argument to |
107 | triggers. This actually changed for inlined code a while back, but the |
108 | non-inlined version and the docs were still out of date. |
109 | |
110 | If by some chance you actually used this feature, the workaround is |
111 | simple. You fetch the attribute object from out of the C<$self> |
112 | that is passed as the first argument to trigger, like so: |
113 | |
114 | has 'foo' => ( |
115 | is => 'ro', |
116 | isa => 'Any', |
117 | trigger => sub { |
118 | my ( $self, $value ) = @_; |
119 | my $attr = $self->meta->find_attribute_by_name('foo'); |
120 | |
121 | # ... |
122 | } |
123 | ); |
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124 | |
125 | =head1 Version 0.66 |
126 | |
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127 | If you created a subtype and passed a parent that Moose didn't know |
128 | about, it simply ignored the parent. Now it automatically creates the |
129 | parent as a class type. This may not be what you want, but is less |
130 | broken than before. |
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131 | |
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132 | You could declare a name with subtype such as "Foo!Bar". Moose would |
133 | accept this allowed, but if you used it in a parameterized type such |
134 | as "ArrayRef[Foo!Bar]" it wouldn't work. We now do some vetting on |
135 | names created via the sugar functions, so that they can only contain |
136 | alphanumerics, ":", and ".". |
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137 | |
138 | =head1 Version 0.65 |
139 | |
140 | Methods created via an attribute can now fulfill a C<requires> |
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141 | declaration for a role. Honestly we don't know why Stevan didn't make |
142 | this work originally, he was just insane or something. |
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143 | |
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144 | Stack traces from inlined code will now report the line and file as |
145 | being in your class, as opposed to in Moose guts. |
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146 | |
147 | =head1 Version 0.62_02 |
148 | |
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149 | When a class does not provide all of a role's required methods, the |
150 | error thrown now mentions all of the missing methods, as opposed to |
151 | just the first missing method. |
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152 | |
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153 | Moose will no longer inline a constructor for your class unless it |
154 | inherits its constructor is inherited from Moose::Object, and will |
155 | warn when it doesn't inline. If you want to force inlining anyway, |
156 | pass C<< "replace_constructor => 1 >> to C<make_immutable>. |
157 | |
158 | If you want to get rid of the warning, pass C<< inline_constructor => |
159 | 1 >>. |
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160 | |
161 | =head1 Version 0.62 |
162 | |
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163 | Removed the (deprecated) C<make_immutable> keyword. |
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164 | |
165 | Removing an attribute from a class now also removes delegation |
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166 | (C<handles>) methods installed for that attribute. This is correct |
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167 | behavior, but if you were wrongly relying on it you might get bit. |
168 | |
169 | =head1 Version 0.58 |
170 | |
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171 | Roles now add methods by calling C<add_method>, not |
172 | C<alias_method>. They make sure to always provide a method object, |
173 | which will be cloned internally. This means that it is now possible to |
174 | track the source of a method provided by a role, and even follow its |
175 | history through intermediate roles. This means that methods added by |
176 | a role now show up when looking at a class's method list/map. |
177 | |
178 | Parameter and Union args are now sorted, this makes Int|Str the same |
179 | constraint as Str|Int. Also, incoming type constraint strings are |
180 | normalized to remove all whitespace differences. This is mostly for |
181 | internals and should not affect outside code. |
182 | |
183 | L<Moose::Exporter> will no longer remove a subroutine that the |
184 | exporting package re-exports. Moose re-exports the Carp::confess |
185 | function, among others. The reasoning is that we cannot know whether |
186 | you have also explicitly imported those functions for your own use, so |
187 | we err on the safe side and always keep them. |
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188 | |
189 | =head1 Version 0.56 |
190 | |
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191 | C<Moose::init_meta> should now be called as a method. |
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192 | |
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193 | New modules for extension writers, L<Moose::Exporter> and |
194 | L<Moose::Util::MetaRole>. |
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195 | |
196 | =head1 Version 0.55_01 |
197 | |
198 | Implemented metaclass traits (and wrote a recipe for it): |
199 | |
200 | use Moose -traits => 'Foo' |
201 | |
202 | This should make writing small Moose extensions a little |
203 | easier. |
204 | |
205 | =head1 Version 0.55 |
206 | |
207 | Fixed C<coerce> to accept anon types just like C<subtype> can. |
208 | So that you can do: |
209 | |
210 | coerce $some_anon_type => from 'Str' => via { ... }; |
211 | |
212 | =head1 Version 0.51 |
213 | |
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214 | Added C<BUILDARGS>, a new step in C<< Moose::Object->new() >>. |
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215 | |
216 | =head1 Version 0.49 |
217 | |
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218 | Fixed how the C<< is => (ro|rw) >> works with custom defined |
219 | C<reader>, C<writer> and C<accessor> options. See the below table for |
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220 | details: |
221 | |
222 | is => ro, writer => _foo # turns into (reader => foo, writer => _foo) |
223 | is => rw, writer => _foo # turns into (reader => foo, writer => _foo) |
224 | is => rw, accessor => _foo # turns into (accessor => _foo) |
225 | is => ro, accessor => _foo # error, accesor is rw |
226 | |
227 | =head1 Version 0.45 |
228 | |
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229 | The C<before/around/after> method modifiers now support regexp |
230 | matching of method names. NOTE: this only works for classes, it is |
231 | currently not supported in roles, but, ... patches welcome. |
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232 | |
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233 | The C<has> keyword for roles now accepts the same array ref form that |
234 | L<Moose>.pm does for classes. |
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235 | |
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236 | A trigger on a read-only attribute is no longer an error, as it's |
237 | useful to trigger off of the constructor. |
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238 | |
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239 | Subtypes of parameterizable types now are parameterizable types |
240 | themselves. |
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241 | |
242 | =head1 Version 0.44 |
243 | |
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244 | Fixed issue where C<DEMOLISHALL> was eating the value in C<$@>, and so |
245 | not working correctly. It still kind of eats them, but so does vanilla |
246 | perl. |
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247 | |
248 | =head1 Version 0.41 |
249 | |
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250 | Inherited attributes may now be extended without restriction on the |
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251 | type ('isa', 'does'). |
252 | |
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253 | The entire set of Moose::Meta::TypeConstraint::* classes were |
254 | refactored in this release. If you were relying on their internals you |
255 | should test your code carefully. |
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256 | |
257 | =head1 Version 0.40 |
258 | |
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259 | Documenting the use of '+name' with attributes that come from recently |
260 | composed roles. It makes sense, people are using it, and so why not |
261 | just officially support it. |
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262 | |
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263 | The C<< Moose::Meta::Class->create >> method now supports roles. |
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264 | |
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265 | It is now possible to make anonymous enum types by passing C<enum> an |
266 | array reference instead of the C<< enum $name => @values >>. |
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267 | |
268 | =head1 Version 0.37 |
269 | |
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270 | Added the C<make_immutable> keyword as a shortcut to calling |
271 | C<make_immutable> on the meta object. This eventually got removed! |
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272 | |
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273 | Made C<< init_arg => undef >> work in Moose. This means "do not accept |
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274 | a constructor parameter for this attribute". |
275 | |
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276 | Type errors now use the provided message. Prior to this release they |
277 | didn't. |
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278 | |
279 | =head1 Version 0.34 |
280 | |
281 | Moose is now a postmodern object system :) |
282 | |
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283 | The Role system was completely refactored. It is 100% backwards |
284 | compat, but the internals were totally changed. If you relied on the |
285 | internals then you are advised to test carefully. |
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286 | |
287 | Added method exclusion and aliasing for Roles in this release. |
288 | |
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289 | Added the L<Moose::Util::TypeConstraints::OptimizedConstraints> |
290 | module. |
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291 | |
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292 | Passing a list of values to an accessor (which is only expecting one |
293 | value) used to be silently ignored, now it throws an error. |
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294 | |
295 | =head1 Version 0.26 |
296 | |
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297 | Added parameterized types and did a pretty heavy refactoring of the |
298 | type constraint system. |
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299 | |
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300 | Better framework extendability and better support for "making your own |
301 | Moose". |
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302 | |
303 | =head1 Version 0.25 or before |
304 | |
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305 | Honestly, you shouldn't be using versions of Moose that are this old, |
306 | so many bug fixes and speed improvements have been made you would be |
307 | crazy to not upgrade. |
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308 | |
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309 | Also, I am tired of going through the Changelog so I am stopping here, |
310 | if anyone would like to continue this please feel free. |
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311 | |
312 | =head1 AUTHOR |
313 | |
314 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
315 | |
316 | =head1 COPYRIGHT AND LICENSE |
317 | |
318 | Copyright 2009 by Infinity Interactive, Inc. |
319 | |
320 | L<http://www.iinteractive.com> |
321 | |
322 | This library is free software; you can redistribute it and/or modify |
323 | it under the same terms as Perl itself. |
324 | |
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325 | =cut |