11 resolve_metaclass_alias
26 # Moose::Util compatible utilities
29 return Mouse::Module::class_of( $_[0] );
33 my ($class_or_obj, $role) = @_;
\r
35 my $meta = Mouse::Module::class_of($class_or_obj);
\r
37 return 0 unless defined $meta;
\r
38 return 1 if $meta->does_role($role);
\r
46 if ($] >= 5.009_005) {
48 $impl = \&mro::get_linear_isa;
52 eval { require MRO::Compat };
56 $impl = \&mro::get_linear_isa;
58 # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV
59 my $_get_linear_isa_dfs; # this recurses so it isn't pretty
60 $_get_linear_isa_dfs = sub {
63 my $classname = shift;
65 my @lin = ($classname);
67 foreach my $parent (@{"$classname\::ISA"}) {
68 my $plin = $_get_linear_isa_dfs->($parent);
69 foreach my $p(@$plin) {
70 next if exists $stored{$p};
77 # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^
78 $impl = $_get_linear_isa_dfs;
84 *get_linear_isa = $impl;
87 { # taken from Sub::Identify
88 sub get_code_info($) {
\r
90 ref($coderef) or return;
\r
92 my $cv = B::svref_2object($coderef);
\r
93 $cv->isa('B::CV') or return;
96 $gv->isa('B::GV') or return;
\r
98 return ($gv->STASH->NAME, $gv->NAME);
\r
102 # taken from Mouse::Util (0.90)
106 sub resolve_metaclass_alias {
\r
107 my ( $type, $metaclass_name, %options ) = @_;
\r
109 my $cache_key = $type . q{ } . ( $options{trait} ? '-Trait' : '' );
\r
111 return $cache{$cache_key}{$metaclass_name} ||= do{
\r
113 my $possible_full_name = join '::',
114 'Mouse::Meta', $type, 'Custom', ($options{trait} ? 'Trait' : ()), $metaclass_name
117 my $loaded_class = load_first_existing_class(
\r
118 $possible_full_name,
\r
122 $loaded_class->can('register_implementation')
\r
123 ? $loaded_class->register_implementation
\r
129 # taken from Class/MOP.pm
130 sub is_valid_class_name {
133 return 0 if ref($class);
134 return 0 unless defined($class);
136 return 1 if $class =~ /^\w+(?:::\w+)*$/;
141 # taken from Class/MOP.pm
142 sub load_first_existing_class {
148 for my $class (@classes) {
149 my $e = _try_load_one_class($class);
152 $exceptions{$class} = $e;
159 return $found if $found;
164 sprintf( "Could not load class (%s) because : %s",
165 $_, $exceptions{$_} )
170 # taken from Class/MOP.pm
171 sub _try_load_one_class {
174 unless ( is_valid_class_name($class) ) {
175 my $display = defined($class) ? $class : 'undef';
176 confess "Invalid class name ($display)";
179 return if is_class_loaded($class);
181 my $file = $class . '.pm';
186 eval { require($file) };
194 my $e = _try_load_one_class($class);
195 confess "Could not load class ($class) because : $e" if $e;
200 my %is_class_loaded_cache;
201 sub is_class_loaded {
204 return 0 if ref($class) || !defined($class) || !length($class);
206 return 1 if $is_class_loaded_cache{$class};
208 # walk the symbol table tree to avoid autovififying
209 # \*{${main::}{"Foo::"}} == \*main::Foo::
212 foreach my $part (split('::', $class)) {
213 my $entry = \$pack->{$part . '::'};
214 return 0 if ref($entry) ne 'GLOB';
215 $pack = *{$entry}{HASH} or return 0;
218 # check for $VERSION or @ISA
219 return ++$is_class_loaded_cache{$class} if exists $pack->{VERSION}
220 && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
221 return ++$is_class_loaded_cache{$class} if exists $pack->{ISA}
222 && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
224 # check for any method
225 foreach my $name( keys %{$pack} ) {
226 my $entry = \$pack->{$name};
227 return ++$is_class_loaded_cache{$class} if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
235 sub apply_all_roles {
236 my $meta = Mouse::Meta::Class->initialize(shift);
240 # Basis of Data::OptList
241 my $max = scalar(@_);
242 for (my $i = 0; $i < $max ; $i++) {
243 if ($i + 1 < $max && ref($_[$i + 1])) {
244 push @roles, [ $_[$i++] => $_[$i] ];
246 push @roles, [ $_[$i] => {} ];
248 my $role_name = $roles[-1][0];
249 load_class($role_name);
250 ( $role_name->can('meta') && $role_name->meta->isa('Mouse::Meta::Role') )
251 || $meta->throw_error("You can only consume roles, $role_name(".$role_name->meta.") is not a Mouse role");
254 if ( scalar @roles == 1 ) {
255 my ( $role, $params ) = @{ $roles[0] };
256 $role->meta->apply( $meta, ( defined $params ? %$params : () ) );
259 Mouse::Meta::Role->combine_apply($meta, @roles);
267 $feature ||= ( caller(1) )[3]; # subroutine name
269 local $Carp::CarpLevel = $Carp::CarpLevel + 2;
270 Carp::croak("Mouse does not currently support $feature");
279 Mouse::Util - features, with or without their dependencies
281 =head1 IMPLEMENTATIONS FOR
283 =head2 L<MRO::Compat>
285 =head3 get_linear_isa