-#!/usr/bin/env perl
package Mouse::Util;
use strict;
use warnings;
use base qw/Exporter/;
-use Carp;
-use Scalar::Util qw(blessed looks_like_number openhandle reftype weaken);
+
+use Carp qw(confess);
+use B ();
our @EXPORT_OK = qw(
- blessed looks_like_number openhandle reftype weaken
+ find_meta
+ does_role
+ resolve_metaclass_alias
+ english_list
+
+ load_class
+ is_class_loaded
+
+ apply_all_roles
+ not_supported
+
get_linear_isa
+ get_code_info
);
our %EXPORT_TAGS = (
all => \@EXPORT_OK,
);
+# Moose::Util compatible utilities
+
+sub find_meta{
+ return Mouse::Meta::Module::class_of( $_[0] );
+}
+
+sub does_role{
+ my ($class_or_obj, $role) = @_;\r
+\r
+ my $meta = Mouse::Meta::Module::class_of($class_or_obj);\r
+\r
+ return 0 unless defined $meta;\r
+ return 1 if $meta->does_role($role);\r
+ return 0;
+}
+
+
+
BEGIN {
my $impl;
- if (\&mro::get_linear_isa) {
+ if ($] >= 5.009_005) {
+ require mro;
$impl = \&mro::get_linear_isa;
} else {
- my $loaded = do {
- local $SIG{__DIE__} = 'DEFAULT';
- eval "use MRO::Compat (); 1";
+ my $e = do {
+ local $@;
+ eval { require MRO::Compat };
+ $@;
};
- if ($loaded) {
+ if (!$e) {
$impl = \&mro::get_linear_isa;
} else {
# VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV
- my $code; # this recurses so it isn't pretty
- $code = sub {
+ 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 = $code->($parent);
- foreach (@$plin) {
- next if exists $stored{$_};
- push(@lin, $_);
- $stored{$_} = 1;
+ 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 = $code;
+ $impl = $_get_linear_isa_dfs;
+ }
+ }
+
+
+ no warnings 'once';
+ *get_linear_isa = $impl;
+}
+
+{ # taken from Sub::Identify
+ sub get_code_info($) {\r
+ my ($coderef) = @_;\r
+ ref($coderef) or return;\r
+
+ my $cv = B::svref_2object($coderef);\r
+ $cv->isa('B::CV') or return;
+
+ my $gv = $cv->GV;\r
+ $gv->isa('B::GV') or return;\r
+\r
+ return ($gv->STASH->NAME, $gv->NAME);\r
+ }\r
+}
+
+# taken from Mouse::Util (0.90)
+{
+ my %cache;
+
+ sub resolve_metaclass_alias {\r
+ my ( $type, $metaclass_name, %options ) = @_;\r
+\r
+ my $cache_key = $type . q{ } . ( $options{trait} ? '-Trait' : '' );\r
+
+ return $cache{$cache_key}{$metaclass_name} ||= do{\r
+\r
+ my $possible_full_name = join '::',
+ 'Mouse::Meta', $type, 'Custom', ($options{trait} ? 'Trait' : ()), $metaclass_name
+ ;
+
+ my $loaded_class = load_first_existing_class(\r
+ $possible_full_name,\r
+ $metaclass_name\r
+ );\r
+\r
+ $loaded_class->can('register_implementation')\r
+ ? $loaded_class->register_implementation\r
+ : $loaded_class;
+ };\r
+ }
+}
+
+# taken from Class/MOP.pm
+sub is_valid_class_name {
+ my $class = shift;
+
+ return 0 if ref($class);
+ return 0 unless defined($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) {
+ my $e = _try_load_one_class($class);
+
+ if ($e) {
+ $exceptions{$class} = $e;
+ }
+ else {
+ $found = $class;
+ last;
}
}
- no strict 'refs';
- *{ __PACKAGE__ . '::get_linear_isa'} = $impl;
+ 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 $class = shift;
+
+ unless ( is_valid_class_name($class) ) {
+ my $display = defined($class) ? $class : 'undef';
+ confess "Invalid class name ($display)";
+ }
+
+ return if is_class_loaded($class);
+
+ my $file = $class . '.pm';
+ $file =~ s{::}{/}g;
+
+ return do {
+ local $@;
+ eval { require($file) };
+ $@;
+ };
+}
+
+
+sub load_class {
+ my $class = shift;
+ my $e = _try_load_one_class($class);
+ confess "Could not load class ($class) because : $e" if $e;
+
+ 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::
+
+ my $pack = \%::;
+ foreach my $part (split('::', $class)) {
+ my $entry = \$pack->{$part . '::'};
+ return 0 if ref($entry) ne 'GLOB';
+ $pack = *{$entry}{HASH} or return 0;
+ }
+
+ # check for $VERSION or @ISA
+ return ++$is_class_loaded_cache{$class} if exists $pack->{VERSION}
+ && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
+ return ++$is_class_loaded_cache{$class} 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};
+ }
+
+ # fail
+ return 0;
+}
+
+
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])) {
} else {
push @roles, [ $_[$i] => {} ];
}
+ 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");
}
- foreach my $role_spec (@roles) {
- Mouse::load_class( $role_spec->[0] );
- }
-
- ( $_->[0]->can('meta') && $_->[0]->meta->isa('Mouse::Meta::Role') )
- || croak("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;
+}
+
+# taken from Moose::Util 0.90
+sub english_list {
+ return $_[0] if @_ == 1;\r
+ my @items = sort @_;\r
+\r
+ return "$items[0] and $items[1]" if @items == 2;\r
+\r
+ my $tail = pop @items;\r
+\r
+ return join q{, }, @items, "and $tail";\r
+}
+
+sub not_supported{
+ my($feature) = @_;
+
+ $feature ||= ( caller(1) )[3]; # subroutine name
+
+ local $Carp::CarpLevel = $Carp::CarpLevel + 2;
+ Carp::croak("Mouse does not currently support $feature");
}
1;
=head3 get_linear_isa
-=head2 L<Scalar::Util>
-
-=head3 blessed
-
-=head3 looks_like_number
-
-=head3 reftype
-
-=head3 openhandle
-
-=head3 weaken
-
-C<weaken> I<must> be implemented in XS. If the user tries to use C<weaken>
-without L<Scalar::Util>, an error is thrown.
-
-=head2 Test::Exception
-
-=head3 throws_ok
-
-=head3 lives_ok
-
=cut
projects / gitmo/Mouse.git / blobdiff