-#!/usr/bin/env perl
package Mouse::Util;
use strict;
use warnings;
-use base 'Exporter';
-
-our %dependencies = (
- 'MRO::Compat' => {
- 'get_linear_isa' => {
- loaded => \&mro::get_linear_isa,
- not_loaded => do {
- # this recurses so it isn't pretty
- my $code;
- $code = 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;
- }
+use base qw/Exporter/;
+use Carp qw(confess);
+use B ();
+
+our @EXPORT_OK = qw(
+ get_linear_isa
+ apply_all_roles
+ get_code_info
+);
+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;
}
- },
- },
- },
-);
+ return \@lin;
+ };
+# ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^
+ $impl = $_get_linear_isa_dfs;
+ }
+ }
-our @EXPORT_OK = map { keys %$_ } values %dependencies;
-for my $module_name (keys %dependencies) {
- (my $file = "$module_name.pm") =~ s{::}{/}g;
+ no warnings 'once';
+ *get_linear_isa = $impl;
+}
- my $loaded = do {
- local $SIG{__DIE__} = 'DEFAULT';
- eval "require '$file'; 1";
- };
+{ # 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
+}
- for my $method_name (keys %{ $dependencies{ $module_name } }) {
- my $producer = $dependencies{$module_name}{$method_name};
- my $implementation;
+# taken from Class/MOP.pm
+{
+ my %cache;
- if (ref($producer) eq 'HASH') {
- $implementation = $loaded
- ? $producer->{loaded}
- : $producer->{not_loaded};
+ 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 {
- $implementation = $loaded
- ? $module_name->can($method_name)
- : $producer;
+ $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);
- no strict 'refs';
- *{ __PACKAGE__ . '::' . $method_name } = $implementation;
+ 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;
}
1;
+__END__
+
+=head1 NAME
+
+Mouse::Util - features, with or without their dependencies
+
+=head1 IMPLEMENTATIONS FOR
+
+=head2 L<MRO::Compat>
+
+=head3 get_linear_isa
+
+=cut
+