Commit | Line | Data |
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1 | package MooseX::Role::Parameterized; |
fc4a95b6 |
2 | use Moose ( |
3 | extends => { -as => 'moose_extends' }, |
7557429d |
4 | around => { -as => 'moose_around' }, |
2293e5f1 |
5 | qw/confess blessed/, |
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6 | ); |
767906ab |
7 | moose_extends 'Moose::Exporter'; |
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8 | |
7b42fc96 |
9 | use Moose::Role (); |
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10 | |
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11 | use MooseX::Role::Parameterized::Meta::Role::Parameterizable; |
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12 | |
a457ed60 |
13 | our $CURRENT_METACLASS; |
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14 | |
5b82ffb1 |
15 | __PACKAGE__->setup_import_methods( |
ff2ccd89 |
16 | with_caller => ['parameter', 'role', 'method', 'has', 'with', 'extends', |
17 | 'requires', 'excludes', 'augment', 'inner', 'before', |
18 | 'after', 'around', 'super', 'override'], |
19 | as_is => [ 'confess', 'blessed' ], |
19af6e75 |
20 | ); |
21 | |
22 | sub parameter { |
23 | my $caller = shift; |
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24 | |
25 | confess "'parameter' may not be used inside of the role block" |
26 | if $CURRENT_METACLASS; |
27 | |
ff2ccd89 |
28 | my $meta = Class::MOP::Class->initialize($caller); |
bd3dd853 |
29 | |
ff2ccd89 |
30 | my $names = shift; |
bd3dd853 |
31 | $names = [$names] if !ref($names); |
32 | |
33 | for my $name (@$names) { |
ff2ccd89 |
34 | $meta->add_parameter($name, @_); |
bd3dd853 |
35 | } |
19af6e75 |
36 | } |
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37 | |
e8e8ef39 |
38 | sub role (&) { |
5b82ffb1 |
39 | my $caller = shift; |
40 | my $role_generator = shift; |
9a21e637 |
41 | Class::MOP::Class->initialize($caller)->role_generator($role_generator); |
5b82ffb1 |
42 | } |
43 | |
7b42fc96 |
44 | sub init_meta { |
45 | my $self = shift; |
46 | |
47 | return Moose::Role->init_meta(@_, |
d93bd54d |
48 | metaclass => 'MooseX::Role::Parameterized::Meta::Role::Parameterizable', |
7b42fc96 |
49 | ); |
50 | } |
51 | |
a457ed60 |
52 | sub has { |
ff2ccd89 |
53 | my $caller = shift; |
54 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
a457ed60 |
55 | |
209e00d2 |
56 | my $names = shift; |
a457ed60 |
57 | $names = [$names] if !ref($names); |
58 | |
59 | for my $name (@$names) { |
ff2ccd89 |
60 | $meta->add_attribute($name, @_); |
a457ed60 |
61 | } |
62 | } |
63 | |
209e00d2 |
64 | sub method { |
209e00d2 |
65 | my $caller = shift; |
ff2ccd89 |
66 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
67 | |
209e00d2 |
68 | my $name = shift; |
69 | my $body = shift; |
70 | |
ff2ccd89 |
71 | my $method = $meta->method_metaclass->wrap( |
209e00d2 |
72 | package_name => $caller, |
73 | name => $name, |
74 | body => $body, |
75 | ); |
76 | |
ff2ccd89 |
77 | $meta->add_method($name => $method); |
209e00d2 |
78 | } |
79 | |
03c4551d |
80 | sub before { |
ff2ccd89 |
81 | my $caller = shift; |
82 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
03c4551d |
83 | |
84 | my $code = pop @_; |
85 | |
86 | for (@_) { |
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87 | Carp::croak "Roles do not currently support " |
03c4551d |
88 | . ref($_) |
89 | . " references for before method modifiers" |
90 | if ref $_; |
ff2ccd89 |
91 | $meta->add_before_method_modifier($_, $code); |
03c4551d |
92 | } |
93 | } |
94 | |
95 | sub after { |
ff2ccd89 |
96 | my $caller = shift; |
97 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
03c4551d |
98 | |
99 | my $code = pop @_; |
100 | |
101 | for (@_) { |
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102 | Carp::croak "Roles do not currently support " |
03c4551d |
103 | . ref($_) |
104 | . " references for after method modifiers" |
105 | if ref $_; |
ff2ccd89 |
106 | $meta->add_after_method_modifier($_, $code); |
03c4551d |
107 | } |
108 | } |
109 | |
110 | sub around { |
ff2ccd89 |
111 | my $caller = shift; |
112 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
03c4551d |
113 | |
114 | my $code = pop @_; |
115 | |
116 | for (@_) { |
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117 | Carp::croak "Roles do not currently support " |
03c4551d |
118 | . ref($_) |
119 | . " references for around method modifiers" |
120 | if ref $_; |
ff2ccd89 |
121 | $meta->add_around_method_modifier($_, $code); |
03c4551d |
122 | } |
123 | } |
124 | |
d55c8861 |
125 | sub with { |
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126 | my $caller = shift; |
127 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
128 | |
129 | Moose::Util::apply_all_roles($meta, @_); |
d55c8861 |
130 | } |
131 | |
eac6d242 |
132 | sub requires { |
ff2ccd89 |
133 | my $caller = shift; |
134 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
135 | |
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136 | Carp::croak "Must specify at least one method" unless @_; |
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137 | $meta->add_required_methods(@_); |
eac6d242 |
138 | } |
139 | |
fa627596 |
140 | sub excludes { |
ff2ccd89 |
141 | my $caller = shift; |
142 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
143 | |
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144 | Carp::croak "Must specify at least one role" unless @_; |
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145 | $meta->add_excluded_roles(@_); |
fa627596 |
146 | } |
147 | |
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148 | # see Moose.pm for discussion |
149 | sub super { |
150 | return unless $Moose::SUPER_BODY; |
151 | $Moose::SUPER_BODY->(@Moose::SUPER_ARGS); |
152 | } |
153 | |
154 | sub override { |
ff2ccd89 |
155 | my $caller = shift; |
156 | my $meta = $CURRENT_METACLASS || Class::MOP::Class->initialize($caller); |
20725a2d |
157 | |
158 | my ($name, $code) = @_; |
ff2ccd89 |
159 | $meta->add_override_method_modifier($name, $code); |
20725a2d |
160 | } |
161 | |
767906ab |
162 | sub extends { Carp::croak "Roles do not currently support 'extends'" } |
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163 | |
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164 | sub inner { Carp::croak "Roles cannot support 'inner'" } |
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165 | |
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166 | sub augment { Carp::croak "Roles cannot support 'augment'" } |
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167 | |
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168 | 1; |
169 | |
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170 | __END__ |
171 | |
30788701 |
172 | =head1 NAME |
173 | |
174 | MooseX::Role::Parameterized - parameterized roles |
175 | |
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176 | =head1 SYNOPSIS |
177 | |
178 | package MyRole::Counter; |
179 | use MooseX::Role::Parameterized; |
180 | |
181 | parameter name => ( |
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182 | isa => 'Str', |
183 | required => 1, |
184 | ); |
185 | |
186 | role { |
187 | my $p = shift; |
188 | |
189 | my $name = $p->name; |
190 | |
191 | has $name => ( |
192 | is => 'rw', |
193 | isa => 'Int', |
194 | default => 0, |
195 | ); |
196 | |
197 | method "increment_$name" => sub { |
198 | my $self = shift; |
199 | $self->$name($self->$name + 1); |
200 | }; |
201 | |
202 | method "decrement_$name" => sub { |
203 | my $self = shift; |
204 | $self->$name($self->$name - 1); |
205 | }; |
206 | }; |
207 | |
208 | package MyGame::Tile; |
209 | use Moose; |
210 | |
211 | with 'MyRole::Counter' => { name => 'stepped_on' }; |
212 | |
213 | =head1 L<MooseX::Role::Parameterized::Tutorial> |
214 | |
215 | B<Stop!> If you're new here, please read |
216 | L<MooseX::Role::Parameterized::Tutorial>. |
217 | |
218 | =head1 DESCRIPTION |
219 | |
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220 | Your parameterized role consists of two new things: parameter declarations |
221 | and a C<role> block. |
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222 | |
223 | Parameters are declared using the L</parameter> keyword which very much |
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224 | resembles L<Moose/has>. You can use any option that L<Moose/has> accepts. The |
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225 | default value for the C<is> option is C<ro> as that's a very common case. These |
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226 | parameters will get their values when the consuming class (or role) uses |
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227 | L<Moose/with>. A parameter object will be constructed with these values, and |
228 | passed to the C<role> block. |
229 | |
230 | The C<role> block then uses the usual L<Moose::Role> keywords to build up a |
231 | role. You can shift off the parameter object to inspect what the consuming |
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232 | class provided as parameters. You use the parameters to customize your |
233 | role however you wish. |
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234 | |
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235 | There are many possible implementations for parameterized roles (hopefully with |
236 | a consistent enough API); I believe this to be the easiest and most flexible |
237 | design. Coincidentally, Pugs has an eerily similar design. |
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238 | |
239 | =head1 CAVEATS |
240 | |
241 | You must use this syntax to declare methods in the role block: |
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242 | C<< method NAME => sub { ... }; >>. This is due to a limitation in Perl. In |
243 | return though you can use parameters I<in your methods>! |
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244 | |
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245 | L<Moose::Role/alias> and L<Moose::Role/excludes> are not yet supported. I'm |
246 | completely unsure of whether they should be handled by this module. Until we |
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247 | figure out a plan, either declaring or providing a parameter named C<alias> or |
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248 | C<excludes> is an error. |
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249 | |
250 | =head1 AUTHOR |
251 | |
252 | Shawn M Moore, C<< <sartak@bestpractical.com> >> |
253 | |
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254 | =head1 EXAMPLES |
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255 | |
d5487cd9 |
256 | =over 4 |
257 | |
258 | =item L<MooseX::Role::Matcher> |
259 | |
d5487cd9 |
260 | =item L<MooseX::Role::XMLRPC::Client> |
261 | |
bfac2339 |
262 | =item L<MooseX::RelatedClassRoles> |
263 | |
d5487cd9 |
264 | =item L<WWW::Mechanize::TreeBuilder> |
265 | |
266 | =item L<TAEB::Action::Role::Item> |
267 | |
268 | =item L<KiokuDB::Role::Scan> |
269 | |
270 | =item L<Fey::Role::MakesAliasObjects> |
271 | |
272 | =item L<Fey::Role::HasAliasName> |
273 | |
274 | =item L<Fey::Role::SetOperation> |
275 | |
276 | =back |
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277 | |
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278 | =cut |
279 | |