package Mouse::Util; use strict; use warnings; use base qw/Exporter/; use Carp qw(confess); use B (); our @EXPORT_OK = qw( get_linear_isa apply_all_roles get_code_info not_supported ); our %EXPORT_TAGS = ( all => \@EXPORT_OK, ); BEGIN { my $impl; if ($] >= 5.009_005) { require mro; $impl = \&mro::get_linear_isa; } else { my $e = do { local $@; eval { require MRO::Compat }; $@; }; if (!$e) { $impl = \&mro::get_linear_isa; } else { # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV my $_get_linear_isa_dfs; # this recurses so it isn't pretty $_get_linear_isa_dfs = sub { no strict 'refs'; my $classname = shift; my @lin = ($classname); my %stored; foreach my $parent (@{"$classname\::ISA"}) { my $plin = $_get_linear_isa_dfs->($parent); foreach my $p(@$plin) { next if exists $stored{$p}; push(@lin, $p); $stored{$p} = 1; } } return \@lin; }; # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^ $impl = $_get_linear_isa_dfs; } } no warnings 'once'; *get_linear_isa = $impl; } { # taken from Sub::Identify sub get_code_info($) { my ($coderef) = @_; ref($coderef) or return; my $cv = B::svref_2object($coderef); $cv->isa('B::CV') or return; my $gv = $cv->GV; $gv->isa('B::GV') or return; return ($gv->STASH->NAME, $gv->NAME); } } # taken from Class/MOP.pm { my %cache; sub resolve_metaclass_alias { my ( $type, $metaclass_name, %options ) = @_; my $cache_key = $type; return $cache{$cache_key}{$metaclass_name} if $cache{$cache_key}{$metaclass_name}; my $possible_full_name = 'Mouse::Meta::' . $type . '::Custom::' . $metaclass_name; my $loaded_class = load_first_existing_class( $possible_full_name, $metaclass_name ); return $cache{$cache_key}{$metaclass_name} = $loaded_class->can('register_implementation') ? $loaded_class->register_implementation : $loaded_class; } } # taken from Class/MOP.pm sub is_valid_class_name { my $class = shift; return 0 if ref($class); return 0 unless defined($class); return 0 unless length($class); return 1 if $class =~ /^\w+(?:::\w+)*$/; return 0; } # taken from Class/MOP.pm sub load_first_existing_class { my @classes = @_ or return; my $found; my %exceptions; for my $class (@classes) { unless ( is_valid_class_name($class) ) { my $display = defined($class) ? $class : 'undef'; confess "Invalid class name ($display)"; } my $e = _try_load_one_class($class); if ($e) { $exceptions{$class} = $e; } else { $found = $class; last; } } return $found if $found; confess join( "\n", map { sprintf( "Could not load class (%s) because : %s", $_, $exceptions{$_} ) } @classes ); } # taken from Class/MOP.pm sub _try_load_one_class { my $class = shift; return if Mouse::is_class_loaded($class); my $file = $class . '.pm'; $file =~ s{::}{/}g; return do { local $@; eval { require($file) }; $@; }; } sub apply_all_roles { my $meta = Mouse::Meta::Class->initialize(shift); my @roles; # Basis of Data::OptList my $max = scalar(@_); for (my $i = 0; $i < $max ; $i++) { if ($i + 1 < $max && ref($_[$i + 1])) { push @roles, [ $_[$i++] => $_[$i] ]; } else { push @roles, [ $_[$i] => {} ]; } } foreach my $role_spec (@roles) { Mouse::load_class( $role_spec->[0] ); } ( $_->[0]->can('meta') && $_->[0]->meta->isa('Mouse::Meta::Role') ) || confess("You can only consume roles, " . $_->[0] . " is not a Moose role") foreach @roles; if ( scalar @roles == 1 ) { my ( $role, $params ) = @{ $roles[0] }; $role->meta->apply( $meta, ( defined $params ? %$params : () ) ); } else { Mouse::Meta::Role->combine_apply($meta, @roles); } return; } sub not_supported{ my($feature) = @_; $feature ||= ( caller(1) )[3]; # subroutine name local $Carp::CarpLevel = $Carp::CarpLevel + 2; Carp::croak("Mouse does not currently support $feature"); } 1; __END__ =head1 NAME Mouse::Util - features, with or without their dependencies =head1 IMPLEMENTATIONS FOR =head2 L =head3 get_linear_isa =cut