22 if ($] >= 5.009_005) {
24 $impl = \&mro::get_linear_isa;
28 eval { require MRO::Compat };
32 $impl = \&mro::get_linear_isa;
34 # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV
35 my $_get_linear_isa_dfs; # this recurses so it isn't pretty
36 $_get_linear_isa_dfs = sub {
39 my $classname = shift;
41 my @lin = ($classname);
43 foreach my $parent (@{"$classname\::ISA"}) {
44 my $plin = $_get_linear_isa_dfs->($parent);
45 foreach my $p(@$plin) {
46 next if exists $stored{$p};
53 # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^
54 $impl = $_get_linear_isa_dfs;
60 *get_linear_isa = $impl;
63 { # taken from Sub::Identify
64 sub get_code_info($) {
\r
66 ref($coderef) or return;
\r
68 my $cv = B::svref_2object($coderef);
\r
69 $cv->isa('B::CV') or return;
72 $gv->isa('B::GV') or return;
\r
74 return ($gv->STASH->NAME, $gv->NAME);
\r
78 # taken from Class/MOP.pm
82 sub resolve_metaclass_alias {
83 my ( $type, $metaclass_name, %options ) = @_;
85 my $cache_key = $type;
86 return $cache{$cache_key}{$metaclass_name}
87 if $cache{$cache_key}{$metaclass_name};
89 my $possible_full_name =
96 load_first_existing_class( $possible_full_name,
99 return $cache{$cache_key}{$metaclass_name} =
100 $loaded_class->can('register_implementation')
101 ? $loaded_class->register_implementation
106 # taken from Class/MOP.pm
107 sub is_valid_class_name {
110 return 0 if ref($class);
111 return 0 unless defined($class);
113 return 1 if $class =~ /^\w+(?:::\w+)*$/;
118 # taken from Class/MOP.pm
119 sub load_first_existing_class {
125 for my $class (@classes) {
126 my $e = _try_load_one_class($class);
129 $exceptions{$class} = $e;
136 return $found if $found;
141 sprintf( "Could not load class (%s) because : %s",
142 $_, $exceptions{$_} )
147 # taken from Class/MOP.pm
148 sub _try_load_one_class {
151 unless ( is_valid_class_name($class) ) {
152 my $display = defined($class) ? $class : 'undef';
153 confess "Invalid class name ($display)";
156 return if is_class_loaded($class);
158 my $file = $class . '.pm';
163 eval { require($file) };
171 my $e = _try_load_one_class($class);
172 confess "Could not load class ($class) because : $e" if $e;
177 my %is_class_loaded_cache;
178 sub is_class_loaded {
181 return 0 if ref($class) || !defined($class) || !length($class);
183 return 1 if $is_class_loaded_cache{$class};
185 # walk the symbol table tree to avoid autovififying
186 # \*{${main::}{"Foo::"}} == \*main::Foo::
189 foreach my $part (split('::', $class)) {
190 my $entry = \$pack->{$part . '::'};
191 return 0 if ref($entry) ne 'GLOB';
192 $pack = *{$entry}{HASH} or return 0;
195 # check for $VERSION or @ISA
196 return ++$is_class_loaded_cache{$class} if exists $pack->{VERSION}
197 && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
198 return ++$is_class_loaded_cache{$class} if exists $pack->{ISA}
199 && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
201 # check for any method
202 foreach my $name( keys %{$pack} ) {
203 my $entry = \$pack->{$name};
204 return ++$is_class_loaded_cache{$class} if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
212 sub apply_all_roles {
213 my $meta = Mouse::Meta::Class->initialize(shift);
217 # Basis of Data::OptList
218 my $max = scalar(@_);
219 for (my $i = 0; $i < $max ; $i++) {
220 if ($i + 1 < $max && ref($_[$i + 1])) {
221 push @roles, [ $_[$i++] => $_[$i] ];
223 push @roles, [ $_[$i] => {} ];
225 my $role_name = $roles[-1][0];
226 load_class($role_name);
227 ( $role_name->can('meta') && $role_name->meta->isa('Mouse::Meta::Role') )
228 || $meta->throw_error("You can only consume roles, $role_name(".$role_name->meta.") is not a Mouse role");
231 if ( scalar @roles == 1 ) {
232 my ( $role, $params ) = @{ $roles[0] };
233 $role->meta->apply( $meta, ( defined $params ? %$params : () ) );
236 Mouse::Meta::Role->combine_apply($meta, @roles);
244 $feature ||= ( caller(1) )[3]; # subroutine name
246 local $Carp::CarpLevel = $Carp::CarpLevel + 2;
247 Carp::croak("Mouse does not currently support $feature");
256 Mouse::Util - features, with or without their dependencies
258 =head1 IMPLEMENTATIONS FOR
260 =head2 L<MRO::Compat>
262 =head3 get_linear_isa