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1 | package MooseX::Compiler; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | use B; |
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7 | use Data::Dumper; |
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8 | use Module::Runtime qw( module_notional_filename ); |
9 | use PPI::Document; |
10 | use Scalar::Util qw( blessed ); |
11 | |
12 | use Moose; |
13 | use Moose::Util::TypeConstraints; |
14 | |
15 | my $moose_class = subtype, as 'ClassName', where { |
16 | $_[0]->can('meta') |
17 | && blessed $_[0]->meta() |
18 | && $_[0]->meta()->isa('Moose::Meta::Class'); |
19 | }; |
20 | |
21 | has class => ( |
22 | is => 'ro', |
23 | isa => $moose_class, |
24 | required => 1, |
25 | ); |
26 | |
27 | has _class_meta => ( |
28 | is => 'ro', |
29 | isa => 'Moose::Meta::Class', |
30 | init_arg => undef, |
31 | lazy => 1, |
32 | default => sub { $_[0]->class()->meta() }, |
33 | ); |
34 | |
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35 | has _ppi_document => ( |
36 | is => 'ro', |
37 | isa => 'PPI::Document', |
38 | init_arg => undef, |
39 | lazy => 1, |
40 | builder => '_build_ppi_document', |
41 | ); |
42 | |
43 | has _package_statement => ( |
44 | is => 'ro', |
45 | isa => 'PPI::Statement::Package', |
46 | init_arg => undef, |
47 | lazy => 1, |
48 | builder => '_build_package_statement', |
49 | ); |
50 | |
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51 | sub compile_class { |
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52 | my $self = shift; |
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53 | |
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54 | $self->_modify_class_content(); |
55 | $self->_inline_roles(); |
56 | $self->_inline_constructor(); |
57 | $self->_inline_attributes(); |
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58 | |
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59 | return $self->_ppi_document()->content(); |
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60 | } |
61 | |
f56affb6 |
62 | sub _modify_class_content { |
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63 | my $self = shift; |
64 | |
f56affb6 |
65 | $self->_fixup_line_numbers(); |
66 | $self->_do_not_use_moose(); |
67 | $self->_inline_parents(); |
68 | $self->_load_required_modules(); |
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69 | |
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70 | return; |
71 | } |
72 | |
73 | sub _fixup_line_numbers { |
74 | my $self = shift; |
75 | |
76 | my $code = "#line 3\n"; |
77 | $self->_package_statement()->snext_sibling()->insert_before( $_->clone() ) |
78 | for PPI::Document->new( \$code )->children(); |
79 | |
80 | return; |
81 | } |
82 | |
83 | sub _do_not_use_moose { |
84 | my $self = shift; |
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85 | |
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86 | my $use_nodes = $self->_ppi_document()->find( |
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87 | sub { |
88 | my $node = $_[1]; |
89 | return undef |
90 | if $node->isa('PPI::Statement') |
91 | && !$node->isa('PPI::Statement::Include'); |
92 | return undef if $node->isa('PPI::Structure'); |
93 | return 1 |
94 | if $node->isa('PPI::Statement::Include') |
95 | && $node->module() =~ /^Moose/; |
96 | return 0; |
97 | } |
98 | ); |
99 | |
100 | for my $node ( @{$use_nodes} ) { |
101 | my $replacement_code .= |
102 | defined $node->module_version() |
103 | ? join( |
104 | q{ }, |
105 | 'use', $node->module(), $node->module_version(), '()', ';', |
106 | ) |
107 | : '# ' . $node->content(); |
108 | |
109 | $node->insert_before( $_->clone() ) |
110 | for PPI::Document->new( \$replacement_code )->children(); |
111 | $node->remove(); |
112 | } |
113 | |
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114 | return; |
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115 | } |
116 | |
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117 | sub _inline_parents { |
118 | my $self = shift; |
119 | |
120 | my @supers = $self->_class_meta()->superclasses(); |
121 | return unless @supers; |
122 | |
123 | my $code = 'use parent '; |
124 | $code .= join ', ', map { B::perlstring($_) } @supers; |
125 | $code .= ";\n"; |
126 | |
127 | $self->_package_statement()->insert_after( $_->clone() ) |
128 | for PPI::Document->new( \$code )->children(); |
129 | |
130 | return; |
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131 | } |
132 | |
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133 | # XXX - replace this with something that looks at all the generated code for |
134 | # calls of the form Foo::Bar::quux(...) - also don't load modules that are |
135 | # already being used. |
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136 | sub _load_required_modules { |
137 | my $self = shift; |
138 | |
139 | my $code = "use Scalar::Util ();\nuse Moose::Error::Util ();\nuse Carp ();\n"; |
140 | |
141 | $self->_package_statement()->insert_after( $_->clone() ) |
142 | for PPI::Document->new( \$code )->children(); |
143 | |
144 | return; |
145 | } |
146 | |
147 | sub _inline_roles { |
148 | return; |
149 | } |
150 | |
151 | sub _inline_constructor { |
152 | my $self = shift; |
153 | |
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154 | my $environment = $self->_class_meta()->_eval_environment(); |
155 | delete $environment->{'$meta'}; |
156 | delete $environment->{'@type_constraint_bodies'}; |
157 | |
158 | if ( grep { defined } @{ ${ $environment->{'$triggers'} } || [] } ) { |
159 | die 'Cannot compile a class with triggers for attributes'; |
160 | } |
161 | |
162 | my $body = join "\n", $self->_class_meta()->_inline_new_object(); |
163 | if ( $body =~ /\$meta/ ) { |
164 | die |
165 | 'Cannot compile a class with a constructor that refers to the $meta object'; |
166 | } |
167 | |
168 | my @defs = @{ ${ $environment->{'$defaults'} } }; |
169 | $environment->{'$defaults'} = \( |
170 | [ |
171 | map { ref $defs[$_] ? '$___attributes[' . $_ . ']' : $defs[$_] } |
172 | 0 .. $#defs |
173 | ] |
174 | ); |
175 | |
176 | my $constructor = join "\n", ( |
177 | '{', |
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178 | ( |
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179 | map { |
180 | $self->_serialize_assignment( $_, $environment->{$_} ) . ';' |
181 | } |
182 | keys %{$environment} |
183 | ), |
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184 | 'sub new {', |
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185 | $body, |
186 | '}', |
187 | '}', |
188 | ); |
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189 | |
190 | $constructor .= "\n\n"; |
191 | |
192 | $self->_insert_before_end($constructor); |
193 | |
194 | return; |
195 | } |
196 | |
5405fa51 |
197 | sub _serialize_assignment { |
198 | my $self = shift; |
199 | my $name = shift; |
200 | my $value = shift; |
201 | |
202 | local $Data::Dumper::Terse = 1; |
203 | local $Data::Dumper::Indent = 1; |
204 | local $Data::Dumper::Useqq = 1; |
205 | local $Data::Dumper::Deparse = 1; |
206 | local $Data::Dumper::Quotekeys = 0; |
207 | local $Data::Dumper::Sortkeys = 1; |
208 | |
209 | return |
210 | "$name = " |
211 | . substr( $name, 0, 1 ) . '{ ' |
212 | . Data::Dumper->Dump( [$value] ) . ' }'; |
213 | } |
214 | |
f56affb6 |
215 | sub _inline_attributes { |
216 | return; |
217 | } |
218 | |
219 | sub _insert_before_end { |
220 | my $self = shift; |
221 | my $code = shift; |
222 | |
223 | my $end_node = $self->_ppi_document()->find_first( |
224 | sub { |
225 | my $node = $_[1]; |
226 | |
227 | return 1 |
228 | if $node->isa('PPI::Statement') && $node->content() =~ /^1;/; |
229 | return 0; |
230 | } |
231 | ); |
232 | |
233 | die 'Cannot find the end of the class (looking for a line match /^1;/)' |
234 | unless $end_node; |
235 | |
236 | $end_node->insert_before( $_->clone() ) |
237 | for PPI::Document->new( \$code )->children(); |
238 | |
239 | return; |
240 | } |
241 | |
242 | sub _build_ppi_document { |
243 | my $self = shift; |
244 | |
245 | my $pm_file = module_notional_filename( $self->class() ); |
246 | my $path_to_class = $INC{$pm_file} |
247 | or die "Cannot find $pm_file in %INC!"; |
248 | |
249 | return PPI::Document->new( $path_to_class->stringify() ) |
250 | or die PPI::Document->errstr(); |
251 | } |
252 | |
253 | sub _build_package_statement { |
254 | my $self = shift; |
255 | |
256 | my $package_stmt = $self->_ppi_document()->find_first( |
257 | sub { |
258 | my $node = $_[1]; |
259 | return 1 if $_[1]->isa('PPI::Statement::Package'); |
260 | return 0; |
261 | } |
262 | ); |
263 | |
264 | die 'Cannot find a package statement in this code' |
265 | unless $package_stmt; |
266 | |
267 | return $package_stmt; |
9e60f0d8 |
268 | } |
269 | |
270 | __PACKAGE__->meta()->make_immutable(); |
271 | |
272 | 1; |