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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 0.85 |
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 | |
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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 | =head1 Version 0.84 |
48 | |
49 | The C<Role> type has been deprecated. On its own, it was useless, |
50 | since it just checked C<< $object->can('does') >>. If you were using |
51 | it as a parent type, just call C<role_type('Role::Name')> to create an |
52 | appropriate type instead. |
53 | |
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54 | =head1 Version 0.78 |
55 | |
56 | C<use Moose::Exporter;> now imports C<strict> and C<warnings> into packages |
57 | that use it. |
58 | |
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59 | =head1 Version 0.77 |
60 | |
61 | C<DEMOLISHALL> and C<DEMOLISH> now receive an argument indicating whether or |
62 | not we are in global destruction. |
63 | |
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64 | =head1 Version 0.76 |
65 | |
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66 | Type constraints no longer run coercions for a value that already matches the |
67 | constraint. This may affect some (arguably buggy) edge case coercions that |
68 | rely on side effects in the C<via> clause. |
69 | |
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70 | =head1 Version 0.75 |
71 | |
72 | L<Moose::Exporter> now accepts the C<-metaclass> option for easily |
73 | overriding the metaclass (without L<metaclass>). This works for classes |
74 | and roles. |
75 | |
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76 | =head1 Version 0.74 |
77 | |
85cf0647 |
78 | Added a C<duck_type> sugar function to L<Moose::Util::TypeConstraints> |
79 | to make integration with non-Moose classes easier. It simply checks if |
80 | C<< $obj->can() >> a list of methods. |
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81 | |
612fd754 |
82 | A number of methods (mostly inherited from L<Class::MOP>) have been |
83 | renamed with a leading underscore to indicate their internal-ness. The |
84 | old method names will still work for a while, but will warn that the |
85 | method has been renamed. In a few cases, the method will be removed |
86 | entirely in the future. This may affect MooseX authors who were using |
87 | these methods. |
88 | |
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89 | =head1 Version 0.73 |
90 | |
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91 | Calling C<subtype> with a name as the only argument now throws an |
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92 | exception. If you want an anonymous subtype do: |
93 | |
94 | my $subtype = subtype as 'Foo'; |
95 | |
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96 | This is related to the changes in version 0.71_01. |
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97 | |
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98 | The C<is_needed> method in L<Moose::Meta::Method::Destructor> is now |
99 | only usable as a class method. Previously, it worked as a class or |
100 | object method, with a different internal implementation for each |
101 | version. |
102 | |
103 | The internals of making a class immutable changed a lot in Class::MOP |
104 | 0.78_02, and Moose's internals have changed along with it. The |
105 | external C<< $metaclass->make_immutable >> method still works the same |
106 | way. |
107 | |
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108 | =head1 Version 0.72 |
109 | |
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110 | A mutable class accepted C<< Foo->new(undef) >> without complaint, |
111 | while an immutable class would blow up with an unhelpful error. Now, |
112 | in both cases we throw a helpful error instead. |
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113 | |
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114 | This "feature" was originally added to allow for cases such as this: |
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115 | |
116 | my $args; |
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117 | |
118 | if ( something() ) { |
119 | $args = {...}; |
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120 | } |
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121 | |
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122 | return My::Class->new($args); |
123 | |
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124 | But we decided this is a bad idea and a little too magical, because it |
125 | can easily mask real errors. |
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126 | |
127 | =head1 Version 0.71_01 |
128 | |
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129 | Calling C<type> or C<subtype> without the sugar helpers (C<as>, |
130 | C<where>, C<message>) is now deprecated. |
131 | |
132 | As a side effect, this meant we ended up using Perl prototypes on |
133 | C<as>, and code like this will no longer work: |
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134 | |
135 | use Moose::Util::TypeConstraints; |
136 | use Declare::Constraints::Simple -All; |
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137 | |
138 | subtype 'ArrayOfInts' |
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139 | => as 'ArrayRef' |
140 | => IsArrayRef(IsInt); |
141 | |
142 | Instead it must be changed to this: |
143 | |
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144 | subtype( |
145 | 'ArrayOfInts' => { |
146 | as => 'ArrayRef', |
147 | where => IsArrayRef(IsInt) |
148 | } |
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149 | ); |
150 | |
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151 | If you want to maintain backwards compat with older versions of Moose, |
152 | you must explicitly test Moose's C<VERSION>: |
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153 | |
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154 | if ( Moose->VERSION < 0.71_01 ) { |
155 | subtype 'ArrayOfInts' |
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156 | => as 'ArrayRef' |
157 | => IsArrayRef(IsInt); |
158 | } |
159 | else { |
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160 | subtype( |
161 | 'ArrayOfInts' => { |
162 | as => 'ArrayRef', |
163 | where => IsArrayRef(IsInt) |
164 | } |
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165 | ); |
166 | } |
167 | |
168 | =head1 Version 0.70 |
169 | |
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170 | We no longer pass the meta-attribute object as a final argument to |
171 | triggers. This actually changed for inlined code a while back, but the |
172 | non-inlined version and the docs were still out of date. |
173 | |
174 | If by some chance you actually used this feature, the workaround is |
175 | simple. You fetch the attribute object from out of the C<$self> |
176 | that is passed as the first argument to trigger, like so: |
177 | |
178 | has 'foo' => ( |
179 | is => 'ro', |
180 | isa => 'Any', |
181 | trigger => sub { |
182 | my ( $self, $value ) = @_; |
183 | my $attr = $self->meta->find_attribute_by_name('foo'); |
184 | |
185 | # ... |
186 | } |
187 | ); |
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188 | |
189 | =head1 Version 0.66 |
190 | |
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191 | If you created a subtype and passed a parent that Moose didn't know |
192 | about, it simply ignored the parent. Now it automatically creates the |
193 | parent as a class type. This may not be what you want, but is less |
194 | broken than before. |
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195 | |
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196 | You could declare a name with subtype such as "Foo!Bar". Moose would |
197 | accept this allowed, but if you used it in a parameterized type such |
198 | as "ArrayRef[Foo!Bar]" it wouldn't work. We now do some vetting on |
199 | names created via the sugar functions, so that they can only contain |
200 | alphanumerics, ":", and ".". |
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201 | |
202 | =head1 Version 0.65 |
203 | |
204 | Methods created via an attribute can now fulfill a C<requires> |
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205 | declaration for a role. Honestly we don't know why Stevan didn't make |
206 | this work originally, he was just insane or something. |
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207 | |
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208 | Stack traces from inlined code will now report the line and file as |
209 | being in your class, as opposed to in Moose guts. |
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210 | |
211 | =head1 Version 0.62_02 |
212 | |
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213 | When a class does not provide all of a role's required methods, the |
214 | error thrown now mentions all of the missing methods, as opposed to |
215 | just the first missing method. |
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216 | |
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217 | Moose will no longer inline a constructor for your class unless it |
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218 | inherits its constructor from Moose::Object, and will warn when it |
219 | doesn't inline. If you want to force inlining anyway, pass |
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220 | C<< replace_constructor => 1 >> to C<make_immutable>. |
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221 | |
222 | If you want to get rid of the warning, pass C<< inline_constructor => |
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223 | 0 >>. |
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224 | |
225 | =head1 Version 0.62 |
226 | |
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227 | Removed the (deprecated) C<make_immutable> keyword. |
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228 | |
229 | Removing an attribute from a class now also removes delegation |
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230 | (C<handles>) methods installed for that attribute. This is correct |
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231 | behavior, but if you were wrongly relying on it you might get bit. |
232 | |
233 | =head1 Version 0.58 |
234 | |
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235 | Roles now add methods by calling C<add_method>, not |
236 | C<alias_method>. They make sure to always provide a method object, |
237 | which will be cloned internally. This means that it is now possible to |
238 | track the source of a method provided by a role, and even follow its |
239 | history through intermediate roles. This means that methods added by |
240 | a role now show up when looking at a class's method list/map. |
241 | |
242 | Parameter and Union args are now sorted, this makes Int|Str the same |
243 | constraint as Str|Int. Also, incoming type constraint strings are |
244 | normalized to remove all whitespace differences. This is mostly for |
245 | internals and should not affect outside code. |
246 | |
247 | L<Moose::Exporter> will no longer remove a subroutine that the |
248 | exporting package re-exports. Moose re-exports the Carp::confess |
249 | function, among others. The reasoning is that we cannot know whether |
250 | you have also explicitly imported those functions for your own use, so |
251 | we err on the safe side and always keep them. |
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252 | |
253 | =head1 Version 0.56 |
254 | |
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255 | C<Moose::init_meta> should now be called as a method. |
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256 | |
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257 | New modules for extension writers, L<Moose::Exporter> and |
258 | L<Moose::Util::MetaRole>. |
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259 | |
260 | =head1 Version 0.55_01 |
261 | |
262 | Implemented metaclass traits (and wrote a recipe for it): |
263 | |
264 | use Moose -traits => 'Foo' |
265 | |
266 | This should make writing small Moose extensions a little |
267 | easier. |
268 | |
269 | =head1 Version 0.55 |
270 | |
271 | Fixed C<coerce> to accept anon types just like C<subtype> can. |
272 | So that you can do: |
273 | |
274 | coerce $some_anon_type => from 'Str' => via { ... }; |
275 | |
276 | =head1 Version 0.51 |
277 | |
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278 | Added C<BUILDARGS>, a new step in C<< Moose::Object->new() >>. |
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279 | |
280 | =head1 Version 0.49 |
281 | |
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282 | Fixed how the C<< is => (ro|rw) >> works with custom defined |
283 | C<reader>, C<writer> and C<accessor> options. See the below table for |
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284 | details: |
285 | |
286 | is => ro, writer => _foo # turns into (reader => foo, writer => _foo) |
287 | is => rw, writer => _foo # turns into (reader => foo, writer => _foo) |
288 | is => rw, accessor => _foo # turns into (accessor => _foo) |
289 | is => ro, accessor => _foo # error, accesor is rw |
290 | |
291 | =head1 Version 0.45 |
292 | |
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293 | The C<before/around/after> method modifiers now support regexp |
294 | matching of method names. NOTE: this only works for classes, it is |
295 | currently not supported in roles, but, ... patches welcome. |
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296 | |
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297 | The C<has> keyword for roles now accepts the same array ref form that |
298 | L<Moose>.pm does for classes. |
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299 | |
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300 | A trigger on a read-only attribute is no longer an error, as it's |
301 | useful to trigger off of the constructor. |
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302 | |
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303 | Subtypes of parameterizable types now are parameterizable types |
304 | themselves. |
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305 | |
306 | =head1 Version 0.44 |
307 | |
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308 | Fixed issue where C<DEMOLISHALL> was eating the value in C<$@>, and so |
309 | not working correctly. It still kind of eats them, but so does vanilla |
310 | perl. |
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311 | |
312 | =head1 Version 0.41 |
313 | |
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314 | Inherited attributes may now be extended without restriction on the |
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315 | type ('isa', 'does'). |
316 | |
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317 | The entire set of Moose::Meta::TypeConstraint::* classes were |
318 | refactored in this release. If you were relying on their internals you |
319 | should test your code carefully. |
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320 | |
321 | =head1 Version 0.40 |
322 | |
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323 | Documenting the use of '+name' with attributes that come from recently |
324 | composed roles. It makes sense, people are using it, and so why not |
325 | just officially support it. |
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326 | |
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327 | The C<< Moose::Meta::Class->create >> method now supports roles. |
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328 | |
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329 | It is now possible to make anonymous enum types by passing C<enum> an |
330 | array reference instead of the C<< enum $name => @values >>. |
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331 | |
332 | =head1 Version 0.37 |
333 | |
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334 | Added the C<make_immutable> keyword as a shortcut to calling |
335 | C<make_immutable> on the meta object. This eventually got removed! |
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336 | |
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337 | Made C<< init_arg => undef >> work in Moose. This means "do not accept |
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338 | a constructor parameter for this attribute". |
339 | |
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340 | Type errors now use the provided message. Prior to this release they |
341 | didn't. |
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342 | |
343 | =head1 Version 0.34 |
344 | |
345 | Moose is now a postmodern object system :) |
346 | |
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347 | The Role system was completely refactored. It is 100% backwards |
348 | compat, but the internals were totally changed. If you relied on the |
349 | internals then you are advised to test carefully. |
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350 | |
351 | Added method exclusion and aliasing for Roles in this release. |
352 | |
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353 | Added the L<Moose::Util::TypeConstraints::OptimizedConstraints> |
354 | module. |
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355 | |
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356 | Passing a list of values to an accessor (which is only expecting one |
357 | value) used to be silently ignored, now it throws an error. |
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358 | |
359 | =head1 Version 0.26 |
360 | |
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361 | Added parameterized types and did a pretty heavy refactoring of the |
362 | type constraint system. |
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363 | |
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364 | Better framework extendability and better support for "making your own |
365 | Moose". |
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366 | |
367 | =head1 Version 0.25 or before |
368 | |
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369 | Honestly, you shouldn't be using versions of Moose that are this old, |
370 | so many bug fixes and speed improvements have been made you would be |
371 | crazy to not upgrade. |
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372 | |
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373 | Also, I am tired of going through the Changelog so I am stopping here, |
374 | if anyone would like to continue this please feel free. |
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375 | |
376 | =head1 AUTHOR |
377 | |
378 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
379 | |
380 | =head1 COPYRIGHT AND LICENSE |
381 | |
382 | Copyright 2009 by Infinity Interactive, Inc. |
383 | |
384 | L<http://www.iinteractive.com> |
385 | |
386 | This library is free software; you can redistribute it and/or modify |
387 | it under the same terms as Perl itself. |
388 | |
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389 | =cut |