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2 | use lib '/Users/stevan/Projects/CPAN/Class-MOP/Class-MOP/lib'; |
3 | |
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4 | package Moose; |
5 | |
6 | use strict; |
7 | use warnings; |
8 | |
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9 | our $VERSION = '0.02'; |
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10 | |
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11 | use Scalar::Util 'blessed', 'reftype'; |
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12 | use Carp 'confess'; |
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13 | use Sub::Name 'subname'; |
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14 | |
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15 | use UNIVERSAL::require; |
16 | |
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17 | use Class::MOP; |
18 | |
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19 | use Moose::Meta::Class; |
20 | use Moose::Meta::Attribute; |
21 | |
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22 | use Moose::Object; |
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23 | use Moose::Util::TypeConstraints ':no_export'; |
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24 | |
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25 | sub import { |
26 | shift; |
27 | my $pkg = caller(); |
28 | |
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29 | # we should never export to main |
30 | return if $pkg eq 'main'; |
31 | |
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32 | Moose::Util::TypeConstraints->import($pkg); |
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33 | |
34 | # make a subtype for each Moose class |
35 | Moose::Util::TypeConstraints::subtype($pkg |
36 | => Moose::Util::TypeConstraints::as Object |
37 | => Moose::Util::TypeConstraints::where { $_->isa($pkg) } |
38 | ); |
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39 | |
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40 | my $meta; |
41 | if ($pkg->can('meta')) { |
42 | $meta = $pkg->meta(); |
43 | (blessed($meta) && $meta->isa('Class::MOP::Class')) |
44 | || confess "Whoops, not møøsey enough"; |
45 | } |
46 | else { |
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47 | $meta = Moose::Meta::Class->initialize($pkg => ( |
48 | ':attribute_metaclass' => 'Moose::Meta::Attribute' |
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49 | )); |
50 | $meta->add_method('meta' => sub { |
51 | # re-initialize so it inherits properly |
52 | Moose::Meta::Class->initialize($pkg => ( |
53 | ':attribute_metaclass' => 'Moose::Meta::Attribute' |
54 | )); |
55 | }) |
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56 | } |
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57 | |
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58 | # NOTE: |
59 | # &alias_method will install the method, but it |
60 | # will not name it with |
61 | |
62 | # handle superclasses |
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63 | $meta->alias_method('extends' => subname 'Moose::extends' => sub { |
64 | $_->require for @_; |
65 | $meta->superclasses(@_) |
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66 | }); |
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67 | |
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68 | # handle attributes |
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69 | $meta->alias_method('has' => subname 'Moose::has' => sub { |
70 | my ($name, %options) = @_; |
71 | if (exists $options{is}) { |
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72 | if ($options{is} eq 'ro') { |
73 | $options{reader} = $name; |
74 | } |
75 | elsif ($options{is} eq 'rw') { |
76 | $options{accessor} = $name; |
77 | } |
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78 | } |
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79 | if (exists $options{isa}) { |
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80 | # allow for anon-subtypes here ... |
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81 | if (reftype($options{isa}) && reftype($options{isa}) eq 'CODE') { |
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82 | $options{type_constraint} = $options{isa}; |
83 | } |
84 | else { |
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85 | # otherwise assume it is a constraint |
86 | my $constraint = Moose::Util::TypeConstraints::find_type_constraint($options{isa}); |
87 | # if the constraing it not found .... |
88 | unless (defined $constraint) { |
89 | # assume it is a foreign class, and make |
90 | # an anon constraint for it |
91 | $constraint = Moose::Util::TypeConstraints::subtype( |
92 | Object => Moose::Util::TypeConstraints::where { $_->isa($constraint) } |
93 | ); |
94 | } |
95 | $options{type_constraint} = $constraint; |
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96 | } |
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97 | } |
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98 | if (exists $options{coerce} && $options{coerce} && $options{isa}) { |
99 | my $coercion = Moose::Util::TypeConstraints::find_type_coercion($options{isa}); |
100 | (defined $coercion) |
101 | || confess "Cannot find coercion for type " . $options{isa}; |
102 | $options{coerce} = $coercion; |
103 | } |
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104 | $meta->add_attribute($name, %options) |
105 | }); |
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106 | |
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107 | # handle method modifers |
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108 | $meta->alias_method('before' => subname 'Moose::before' => sub { |
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109 | my $code = pop @_; |
110 | $meta->add_before_method_modifier($_, $code) for @_; |
111 | }); |
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112 | $meta->alias_method('after' => subname 'Moose::after' => sub { |
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113 | my $code = pop @_; |
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114 | $meta->add_after_method_modifier($_, $code) for @_; |
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115 | }); |
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116 | $meta->alias_method('around' => subname 'Moose::around' => sub { |
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117 | my $code = pop @_; |
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118 | $meta->add_around_method_modifier($_, $code) for @_; |
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119 | }); |
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120 | |
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121 | # make sure they inherit from Moose::Object |
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122 | $meta->superclasses('Moose::Object') |
123 | unless $meta->superclasses(); |
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124 | |
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125 | # we recommend using these things |
126 | # so export them for them |
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127 | $meta->alias_method('confess' => \&Carp::confess); |
128 | $meta->alias_method('blessed' => \&Scalar::Util::blessed); |
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129 | } |
130 | |
131 | 1; |
132 | |
133 | __END__ |
134 | |
135 | =pod |
136 | |
137 | =head1 NAME |
138 | |
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139 | Moose - Moose, it's the new Camel |
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140 | |
141 | =head1 SYNOPSIS |
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142 | |
143 | package Point; |
144 | use Moose; |
145 | |
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146 | has 'x' => (isa => 'Int', is => 'rw'); |
147 | has 'y' => (isa => 'Int', is => 'rw'); |
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148 | |
149 | sub clear { |
150 | my $self = shift; |
151 | $self->x(0); |
152 | $self->y(0); |
153 | } |
154 | |
155 | package Point3D; |
156 | use Moose; |
157 | |
158 | extends 'Point'; |
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159 | |
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160 | has 'z' => (isa => 'Int'); |
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161 | |
162 | after 'clear' => sub { |
163 | my $self = shift; |
164 | $self->{z} = 0; |
165 | }; |
166 | |
167 | =head1 CAVEAT |
168 | |
169 | This is a B<very> early release of this module, it still needs |
170 | some fine tuning and B<lots> more documentation. I am adopting |
171 | the I<release early and release often> approach with this module, |
172 | so keep an eye on your favorite CPAN mirror! |
173 | |
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174 | =head1 DESCRIPTION |
175 | |
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176 | Moose is an extension of the Perl 5 object system. |
177 | |
178 | =head2 Another object system!?!? |
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179 | |
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180 | Yes, I know there has been an explosion recently of new ways to |
181 | build object's in Perl 5, most of them based on inside-out objects, |
182 | and other such things. Moose is different because it is not a new |
183 | object system for Perl 5, but instead an extension of the existing |
184 | object system. |
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185 | |
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186 | Moose is built on top of L<Class::MOP>, which is a metaclass system |
187 | for Perl 5. This means that Moose not only makes building normal |
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188 | Perl 5 objects better, but it also provides the power of metaclass |
189 | programming. |
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190 | |
191 | =head2 What does Moose stand for?? |
192 | |
193 | Moose doesn't stand for one thing in particular, however, if you |
194 | want, here are a few of my favorites, feel free to contribute |
195 | more :) |
196 | |
197 | =over 4 |
198 | |
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199 | =item Make Other Object Systems Envious |
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200 | |
201 | =item Makes Object Orientation So Easy |
202 | |
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203 | =item Makes Object Orientation Spiffy- Er (sorry ingy) |
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204 | |
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205 | =item Most Other Object Systems Emasculate |
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206 | |
207 | =item My Overcraft Overfilled (with) Some Eels |
208 | |
209 | =item Moose Often Ovulate Sorta Early |
210 | |
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211 | =item Many Overloaded Object Systems Exists |
212 | |
213 | =item Moose Offers Often Super Extensions |
214 | |
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215 | =back |
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216 | |
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217 | =head1 ACKNOWLEDGEMENTS |
218 | |
219 | =over 4 |
220 | |
221 | =item I blame Sam Vilain for giving me my first hit of meta-model crack. |
222 | |
223 | =item I blame Audrey Tang for encouraging that meta-crack habit in #perl6. |
224 | |
225 | =item Without the love and encouragement of Yuval "nothingmuch" Kogman, |
226 | this module would not be possible (and it wouldn't have a name). |
227 | |
228 | =item The basis of the TypeContraints module was Rob Kinyon's idea |
229 | originally, I just ran with it. |
230 | |
231 | =back |
232 | |
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233 | =head1 SEE ALSO |
234 | |
235 | =over 4 |
236 | |
237 | =item L<http://forum2.org/moose/> |
238 | |
239 | =back |
240 | |
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241 | =head1 BUGS |
242 | |
243 | All complex software has bugs lurking in it, and this module is no |
244 | exception. If you find a bug please either email me, or add the bug |
245 | to cpan-RT. |
246 | |
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247 | =head1 AUTHOR |
248 | |
249 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
250 | |
251 | =head1 COPYRIGHT AND LICENSE |
252 | |
253 | Copyright 2006 by Infinity Interactive, Inc. |
254 | |
255 | L<http://www.iinteractive.com> |
256 | |
257 | This library is free software; you can redistribute it and/or modify |
258 | it under the same terms as Perl itself. |
259 | |
260 | =cut |