11 resolve_metaclass_alias
27 # Moose::Util compatible utilities
30 return Mouse::Module::class_of( $_[0] );
34 my ($class_or_obj, $role) = @_;
\r
36 my $meta = Mouse::Module::class_of($class_or_obj);
\r
38 return 0 unless defined $meta;
\r
39 return 1 if $meta->does_role($role);
\r
47 if ($] >= 5.009_005) {
49 $impl = \&mro::get_linear_isa;
53 eval { require MRO::Compat };
57 $impl = \&mro::get_linear_isa;
59 # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV
60 my $_get_linear_isa_dfs; # this recurses so it isn't pretty
61 $_get_linear_isa_dfs = sub {
64 my $classname = shift;
66 my @lin = ($classname);
68 foreach my $parent (@{"$classname\::ISA"}) {
69 my $plin = $_get_linear_isa_dfs->($parent);
70 foreach my $p(@$plin) {
71 next if exists $stored{$p};
78 # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^
79 $impl = $_get_linear_isa_dfs;
85 *get_linear_isa = $impl;
88 { # taken from Sub::Identify
89 sub get_code_info($) {
\r
91 ref($coderef) or return;
\r
93 my $cv = B::svref_2object($coderef);
\r
94 $cv->isa('B::CV') or return;
97 $gv->isa('B::GV') or return;
\r
99 return ($gv->STASH->NAME, $gv->NAME);
\r
103 # taken from Mouse::Util (0.90)
107 sub resolve_metaclass_alias {
\r
108 my ( $type, $metaclass_name, %options ) = @_;
\r
110 my $cache_key = $type . q{ } . ( $options{trait} ? '-Trait' : '' );
\r
112 return $cache{$cache_key}{$metaclass_name} ||= do{
\r
114 my $possible_full_name = join '::',
115 'Mouse::Meta', $type, 'Custom', ($options{trait} ? 'Trait' : ()), $metaclass_name
118 my $loaded_class = load_first_existing_class(
\r
119 $possible_full_name,
\r
123 $loaded_class->can('register_implementation')
\r
124 ? $loaded_class->register_implementation
\r
130 # taken from Class/MOP.pm
131 sub is_valid_class_name {
134 return 0 if ref($class);
135 return 0 unless defined($class);
137 return 1 if $class =~ /^\w+(?:::\w+)*$/;
142 # taken from Class/MOP.pm
143 sub load_first_existing_class {
149 for my $class (@classes) {
150 my $e = _try_load_one_class($class);
153 $exceptions{$class} = $e;
160 return $found if $found;
165 sprintf( "Could not load class (%s) because : %s",
166 $_, $exceptions{$_} )
171 # taken from Class/MOP.pm
172 sub _try_load_one_class {
175 unless ( is_valid_class_name($class) ) {
176 my $display = defined($class) ? $class : 'undef';
177 confess "Invalid class name ($display)";
180 return if is_class_loaded($class);
182 my $file = $class . '.pm';
187 eval { require($file) };
195 my $e = _try_load_one_class($class);
196 confess "Could not load class ($class) because : $e" if $e;
201 my %is_class_loaded_cache;
202 sub is_class_loaded {
205 return 0 if ref($class) || !defined($class) || !length($class);
207 return 1 if $is_class_loaded_cache{$class};
209 # walk the symbol table tree to avoid autovififying
210 # \*{${main::}{"Foo::"}} == \*main::Foo::
213 foreach my $part (split('::', $class)) {
214 my $entry = \$pack->{$part . '::'};
215 return 0 if ref($entry) ne 'GLOB';
216 $pack = *{$entry}{HASH} or return 0;
219 # check for $VERSION or @ISA
220 return ++$is_class_loaded_cache{$class} if exists $pack->{VERSION}
221 && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
222 return ++$is_class_loaded_cache{$class} if exists $pack->{ISA}
223 && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
225 # check for any method
226 foreach my $name( keys %{$pack} ) {
227 my $entry = \$pack->{$name};
228 return ++$is_class_loaded_cache{$class} if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
236 sub apply_all_roles {
237 my $meta = Mouse::Meta::Class->initialize(shift);
241 # Basis of Data::OptList
242 my $max = scalar(@_);
243 for (my $i = 0; $i < $max ; $i++) {
244 if ($i + 1 < $max && ref($_[$i + 1])) {
245 push @roles, [ $_[$i++] => $_[$i] ];
247 push @roles, [ $_[$i] => {} ];
249 my $role_name = $roles[-1][0];
250 load_class($role_name);
251 ( $role_name->can('meta') && $role_name->meta->isa('Mouse::Meta::Role') )
252 || $meta->throw_error("You can only consume roles, $role_name(".$role_name->meta.") is not a Mouse role");
255 if ( scalar @roles == 1 ) {
256 my ( $role, $params ) = @{ $roles[0] };
257 $role->meta->apply( $meta, ( defined $params ? %$params : () ) );
260 Mouse::Meta::Role->combine_apply($meta, @roles);
265 # taken from Moose::Util 0.90
267 return $_[0] if @_ == 1;
\r
269 my @items = sort @_;
\r
271 return "$items[0] and $items[1]" if @items == 2;
\r
273 my $tail = pop @items;
\r
275 return join q{, }, @items, "and $tail";
\r
281 $feature ||= ( caller(1) )[3]; # subroutine name
283 local $Carp::CarpLevel = $Carp::CarpLevel + 2;
284 Carp::croak("Mouse does not currently support $feature");
293 Mouse::Util - features, with or without their dependencies
295 =head1 IMPLEMENTATIONS FOR
297 =head2 L<MRO::Compat>
299 =head3 get_linear_isa