12 resolve_metaclass_alias
28 # Moose::Util compatible utilities
31 return Mouse::Meta::Module::class_of( $_[0] );
35 my ($class_or_obj, $role) = @_;
\r
37 my $meta = Mouse::Meta::Module::class_of($class_or_obj);
\r
39 return 0 unless defined $meta;
\r
40 return 1 if $meta->does_role($role);
\r
48 if ($] >= 5.009_005) {
50 $impl = \&mro::get_linear_isa;
54 eval { require MRO::Compat };
58 $impl = \&mro::get_linear_isa;
60 # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV
61 my $_get_linear_isa_dfs; # this recurses so it isn't pretty
62 $_get_linear_isa_dfs = sub {
65 my $classname = shift;
67 my @lin = ($classname);
69 foreach my $parent (@{"$classname\::ISA"}) {
70 my $plin = $_get_linear_isa_dfs->($parent);
71 foreach my $p(@$plin) {
72 next if exists $stored{$p};
79 # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^
80 $impl = $_get_linear_isa_dfs;
86 *get_linear_isa = $impl;
89 { # taken from Sub::Identify
90 sub get_code_info($) {
\r
92 ref($coderef) or return;
\r
94 my $cv = B::svref_2object($coderef);
\r
95 $cv->isa('B::CV') or return;
98 $gv->isa('B::GV') or return;
\r
100 return ($gv->STASH->NAME, $gv->NAME);
\r
104 # taken from Mouse::Util (0.90)
108 sub resolve_metaclass_alias {
\r
109 my ( $type, $metaclass_name, %options ) = @_;
\r
111 my $cache_key = $type . q{ } . ( $options{trait} ? '-Trait' : '' );
\r
113 return $cache{$cache_key}{$metaclass_name} ||= do{
\r
115 my $possible_full_name = join '::',
116 'Mouse::Meta', $type, 'Custom', ($options{trait} ? 'Trait' : ()), $metaclass_name
119 my $loaded_class = load_first_existing_class(
\r
120 $possible_full_name,
\r
124 $loaded_class->can('register_implementation')
\r
125 ? $loaded_class->register_implementation
\r
131 # taken from Class/MOP.pm
132 sub is_valid_class_name {
135 return 0 if ref($class);
136 return 0 unless defined($class);
138 return 1 if $class =~ /^\w+(?:::\w+)*$/;
143 # taken from Class/MOP.pm
144 sub load_first_existing_class {
150 for my $class (@classes) {
151 my $e = _try_load_one_class($class);
154 $exceptions{$class} = $e;
161 return $found if $found;
166 sprintf( "Could not load class (%s) because : %s",
167 $_, $exceptions{$_} )
172 # taken from Class/MOP.pm
173 sub _try_load_one_class {
176 unless ( is_valid_class_name($class) ) {
177 my $display = defined($class) ? $class : 'undef';
178 confess "Invalid class name ($display)";
181 return if is_class_loaded($class);
183 my $file = $class . '.pm';
188 eval { require($file) };
196 my $e = _try_load_one_class($class);
197 confess "Could not load class ($class) because : $e" if $e;
202 my %is_class_loaded_cache;
203 sub is_class_loaded {
206 return 0 if ref($class) || !defined($class) || !length($class);
208 return 1 if $is_class_loaded_cache{$class};
210 # walk the symbol table tree to avoid autovififying
211 # \*{${main::}{"Foo::"}} == \*main::Foo::
214 foreach my $part (split('::', $class)) {
215 my $entry = \$pack->{$part . '::'};
216 return 0 if ref($entry) ne 'GLOB';
217 $pack = *{$entry}{HASH} or return 0;
220 # check for $VERSION or @ISA
221 return ++$is_class_loaded_cache{$class} if exists $pack->{VERSION}
222 && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
223 return ++$is_class_loaded_cache{$class} if exists $pack->{ISA}
224 && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
226 # check for any method
227 foreach my $name( keys %{$pack} ) {
228 my $entry = \$pack->{$name};
229 return ++$is_class_loaded_cache{$class} if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
237 sub apply_all_roles {
238 my $meta = Mouse::Meta::Class->initialize(shift);
242 # Basis of Data::OptList
243 my $max = scalar(@_);
244 for (my $i = 0; $i < $max ; $i++) {
245 if ($i + 1 < $max && ref($_[$i + 1])) {
246 push @roles, [ $_[$i++] => $_[$i] ];
248 push @roles, [ $_[$i] => {} ];
250 my $role_name = $roles[-1][0];
251 load_class($role_name);
252 ( $role_name->can('meta') && $role_name->meta->isa('Mouse::Meta::Role') )
253 || $meta->throw_error("You can only consume roles, $role_name(".$role_name->meta.") is not a Mouse role");
256 if ( scalar @roles == 1 ) {
257 my ( $role, $params ) = @{ $roles[0] };
258 $role->meta->apply( $meta, ( defined $params ? %$params : () ) );
261 Mouse::Meta::Role->combine_apply($meta, @roles);
266 # taken from Moose::Util 0.90
268 return $_[0] if @_ == 1;
\r
270 my @items = sort @_;
\r
272 return "$items[0] and $items[1]" if @items == 2;
\r
274 my $tail = pop @items;
\r
276 return join q{, }, @items, "and $tail";
\r
282 $feature ||= ( caller(1) )[3]; # subroutine name
284 local $Carp::CarpLevel = $Carp::CarpLevel + 2;
285 Carp::croak("Mouse does not currently support $feature");
294 Mouse::Util - features, with or without their dependencies
296 =head1 IMPLEMENTATIONS FOR
298 =head2 L<MRO::Compat>
300 =head3 get_linear_isa