package Mouse::Util;
-use strict;
-use warnings;
-use base qw/Exporter/;
+use Mouse::Exporter; # enables strict and warnings
use Carp qw(confess);
+use Scalar::Util qw(blessed);
use B ();
-our @EXPORT_OK = qw(
- find_meta
- does_role
- resolve_metaclass_alias
- english_list
+use constant _MOUSE_VERBOSE => !!$ENV{MOUSE_VERBOSE};
- load_class
- is_class_loaded
+Mouse::Exporter->setup_import_methods(
+ as_is => [qw(
+ find_meta
+ does_role
+ resolve_metaclass_alias
+ apply_all_roles
+ english_list
- apply_all_roles
- not_supported
+ load_class
+ is_class_loaded
- get_linear_isa
- get_code_info
-);
-our %EXPORT_TAGS = (
- all => \@EXPORT_OK,
+ get_linear_isa
+ get_code_info
+
+ get_code_package
+
+ not_supported
+
+ does meta dump
+ _MOUSE_VERBOSE
+ )],
+ groups => {
+ default => [], # export no functions by default
+
+ # The ':meta' group is 'use metaclass' for Mouse
+ meta => [qw(does meta dump _MOUSE_VERBOSE)],
+ },
);
+# aliases as public APIs
+# it must be 'require', not 'use', because Mouse::Meta::Module depends on Mouse::Util
+require Mouse::Meta::Module; # for the entities of metaclass cache utilities
+
+BEGIN {
+ *class_of = \&Mouse::Meta::Module::class_of;
+ *get_metaclass_by_name = \&Mouse::Meta::Module::get_metaclass_by_name;
+ *get_all_metaclass_instances = \&Mouse::Meta::Module::get_all_metaclass_instances;
+ *get_all_metaclass_names = \&Mouse::Meta::Module::get_all_metaclass_names;
+}
+
# Moose::Util compatible utilities
sub find_meta{
- return Mouse::Meta::Module::class_of( $_[0] );
+ return class_of( $_[0] );
}
sub does_role{
- my ($class_or_obj, $role) = @_;
-
- my $meta = Mouse::Meta::Module::class_of($class_or_obj);
+ my ($class_or_obj, $role_name) = @_;
- return 0 unless defined $meta;
- return 1 if $meta->does_role($role);
- return 0;
-}
+ my $meta = class_of($class_or_obj);
+ (defined $role_name)
+ || ($meta || 'Mouse::Meta::Class')->throw_error("You must supply a role name to does()");
+ return defined($meta) && $meta->does_role($role_name);
+}
BEGIN {
my $impl;
return ($gv->STASH->NAME, $gv->NAME);
}
+
+ sub get_code_package{
+ my($coderef) = @_;
+
+ 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;
+ }
}
# taken from Mouse::Util (0.90)
}
}
+# Utilities from Class::MOP
+
+
# taken from Class/MOP.pm
sub is_valid_class_name {
my $class = shift;
my @classes = @_
or return;
- my $found;
my %exceptions;
for my $class (@classes) {
my $e = _try_load_one_class($class);
$exceptions{$class} = $e;
}
else {
- $found = $class;
- last;
+ return $class;
}
}
- return $found if $found;
+ # not found
confess join(
"\n",
map {
}
# taken from Class/MOP.pm
+my %is_class_loaded_cache;
sub _try_load_one_class {
my $class = shift;
confess "Invalid class name ($display)";
}
- return if is_class_loaded($class);
+ return undef if $is_class_loaded_cache{$class} ||= is_class_loaded($class);
my $file = $class . '.pm';
$file =~ s{::}{/}g;
return 1;
}
-my %is_class_loaded_cache;
+
sub is_class_loaded {
my $class = shift;
return 0 if ref($class) || !defined($class) || !length($class);
- return 1 if $is_class_loaded_cache{$class};
-
# walk the symbol table tree to avoid autovififying
# \*{${main::}{"Foo::"}} == \*main::Foo::
}
# check for $VERSION or @ISA
- return ++$is_class_loaded_cache{$class} if exists $pack->{VERSION}
+ return 1 if exists $pack->{VERSION}
&& defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
- return ++$is_class_loaded_cache{$class} if exists $pack->{ISA}
+ return 1 if exists $pack->{ISA}
&& defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
# check for any method
foreach my $name( keys %{$pack} ) {
my $entry = \$pack->{$name};
- return ++$is_class_loaded_cache{$class} if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
+ return 1 if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
}
# fail
sub apply_all_roles {
- my $meta = Mouse::Meta::Class->initialize(shift);
+ my $applicant = blessed($_[0]) ? shift : Mouse::Meta::Class->initialize(shift);
my @roles;
my $max = scalar(@_);
for (my $i = 0; $i < $max ; $i++) {
if ($i + 1 < $max && ref($_[$i + 1])) {
- push @roles, [ $_[$i++] => $_[$i] ];
+ push @roles, [ $_[$i] => $_[++$i] ];
} else {
- push @roles, [ $_[$i] => {} ];
+ push @roles, [ $_[$i] => undef ];
}
my $role_name = $roles[-1][0];
load_class($role_name);
- ( $role_name->can('meta') && $role_name->meta->isa('Mouse::Meta::Role') )
- || $meta->throw_error("You can only consume roles, $role_name(".$role_name->meta.") is not a Mouse role");
+
+ my $metarole = get_metaclass_by_name($role_name);
+ ( $metarole && $metarole->isa('Mouse::Meta::Role') )
+ || $applicant->meta->throw_error("You can only consume roles, $role_name(".$role_name->meta.") is not a Mouse role");
}
if ( scalar @roles == 1 ) {
- my ( $role, $params ) = @{ $roles[0] };
- $role->meta->apply( $meta, ( defined $params ? %$params : () ) );
+ my ( $role_name, $params ) = @{ $roles[0] };
+ get_metaclass_by_name($role_name)->apply( $applicant, defined $params ? $params : () );
}
else {
- Mouse::Meta::Role->combine_apply($meta, @roles);
+ Mouse::Meta::Role->combine(@roles)->apply($applicant);
}
return;
}
return join q{, }, @items, "and $tail";
}
+
+# common utilities
+
sub not_supported{
my($feature) = @_;
Carp::confess("Mouse does not currently support $feature");
}
+# general meta() method
+sub meta :method{
+ return Mouse::Meta::Class->initialize(ref($_[0]) || $_[0]);
+}
+
+# general dump() method
+sub dump :method {
+ my($self, $maxdepth) = @_;
+
+ require 'Data/Dumper.pm'; # we don't want to create its namespace
+ my $dd = Data::Dumper->new([$self]);
+ $dd->Maxdepth(defined($maxdepth) ? $maxdepth : 2);
+ $dd->Indent(1);
+ return $dd->Dump();
+}
+
+# general does() method
+sub does :method;
+*does = \&does_role; # alias
+
1;
__END__
=head1 NAME
-Mouse::Util - features, with or without their dependencies
+Mouse::Util - Features, with or without their dependencies
+
+=head1 VERSION
+
+This document describes Mouse version 0.40
=head1 IMPLEMENTATIONS FOR
-=head2 L<MRO::Compat>
+=head2 Moose::Util
+
+=head3 C<find_meta>
+
+=head3 C<does_role>
+
+=head3 C<resolve_metaclass_alias>
+
+=head3 C<apply_all_roles>
+
+=head3 C<english_list>
+
+=head2 Class::MOP
+
+=head3 C<< is_class_loaded(ClassName) -> Bool >>
+
+Returns whether C<ClassName> is actually loaded or not. It uses a heuristic which
+involves checking for the existence of C<$VERSION>, C<@ISA>, and any
+locally-defined method.
+
+=head3 C<< load_class(ClassName) >>
+
+This will load a given C<ClassName> (or die if it is not loadable).
+This function can be used in place of tricks like
+C<eval "use $module"> or using C<require>.
+
+=head3 C<< Mouse::Util::class_of(ClassName or Object) >>
+
+=head3 C<< Mouse::Util::get_metaclass_by_name(ClassName) >>
+
+=head3 C<< Mouse::Util::get_all_metaclass_instances() >>
+
+=head3 C<< Mouse::Util::get_all_metaclass_names() >>
+
+=head2 MRO::Compat
+
+=head3 C<get_linear_isa>
+
+=head2 Sub::Identify
+
+=head3 C<get_code_info>
+
+=head1 UTILITIES FOR MOUSE
+
+=head3 C<not_supported>
+
+=head1 SEE ALSO
+
+L<Moose::Util>
+
+L<Class::MOP>
+
+L<Sub::Identify>
-=head3 get_linear_isa
+L<MRO::Compat>
=cut
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