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