use strict;
use warnings;
use base qw/Exporter/;
-use Carp;
+use Carp qw(confess);
+use B ();
our @EXPORT_OK = qw(
+ load_class
+ is_class_loaded
get_linear_isa
+ apply_all_roles
+ get_code_info
+ not_supported
);
our %EXPORT_TAGS = (
all => \@EXPORT_OK,
require mro;
$impl = \&mro::get_linear_isa;
} else {
- my $loaded = do {
- local $SIG{__DIE__} = 'DEFAULT';
- eval "require 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 strict 'refs';
- *{ __PACKAGE__ . '::get_linear_isa'} = $impl;
+
+ 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 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 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;
+ }
+ }
+ 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 exists $is_class_loaded_cache{$class};
+
+ # walk the symbol table tree to avoid autovififying
+ # \*{${main::}{"Foo::"}} == \*main::Foo::
+
+ my $pack = \*::;
+ foreach my $part (split('::', $class)) {
+ return 0 unless exists ${$$pack}{"${part}::"};
+ $pack = \*{${$$pack}{"${part}::"}};
+ }
+
+ # check for $VERSION or @ISA
+ return ++$is_class_loaded_cache{$class} if exists ${$$pack}{VERSION}
+ && defined *{${$$pack}{VERSION}}{SCALAR};
+ return ++$is_class_loaded_cache{$class} if exists ${$$pack}{ISA}
+ && defined *{${$$pack}{ISA}}{ARRAY};
+
+ # check for any method
+ foreach ( keys %{$$pack} ) {
+ next if substr($_, -2, 2) eq '::';
+ return ++$is_class_loaded_cache{$class} if defined *{${$$pack}{$_}}{CODE};
+ }
+
+ # fail
+ return 0;
+}
+
+
sub apply_all_roles {
my $meta = Mouse::Meta::Class->initialize(shift);
}
( $_->[0]->can('meta') && $_->[0]->meta->isa('Mouse::Meta::Role') )
- || croak("You can only consume roles, "
+ || confess("You can only consume roles, "
. $_->[0]
. " is not a Moose role")
foreach @roles;
else {
Mouse::Meta::Role->combine_apply($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;
projects / gitmo/Mouse.git / blobdiff