use Carp 'confess';
use Scalar::Util 'weaken';
-use Sub::Identify 'get_code_info';
-
-BEGIN {
- local $@;
- eval {
- require Sub::Name;
- Sub::Name->import(qw(subname));
- 1
- } or eval 'sub subname { $_[1] }';
-
- # this is either part of core or set up appropriately by MRO::Compat
- *check_package_cache_flag = \&mro::get_pkg_gen;
-
- eval {
- require Devel::GlobalDestruction;
- Devel::GlobalDestruction->import("in_global_destruction");
- 1;
- } or *in_global_destruction = sub () { !1 };
-}
-
use Class::MOP::Class;
use Class::MOP::Attribute;
*HAVE_ISAREV = defined(&mro::get_isarev)
? sub () { 1 }
: sub () { 1 };
+
+ # this is either part of core or set up appropriately by MRO::Compat
+ *check_package_cache_flag = \&mro::get_pkg_gen;
}
-our $VERSION = '0.64_06';
+our $VERSION = '0.70_01';
our $XS_VERSION = $VERSION;
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
# after that everything is loaded, if we're allowed try to load faster XS
# versions of various things
-unless ($ENV{CLASS_MOP_NO_XS}) {
+_try_load_xs() or _load_pure_perl();
+
+sub _try_load_xs {
+ return if $ENV{CLASS_MOP_NO_XS};
+
my $e = do {
local $@;
eval {
require XSLoader;
+ # just doing this - no warnings 'redefine' - doesn't work
+ # for some reason
+ local $^W = 0;
__PACKAGE__->XSLoader::load($XS_VERSION);
+
+ require Sub::Name;
+ Sub::Name->import(qw(subname));
+
+ require Devel::GlobalDestruction;
+ Devel::GlobalDestruction->import("in_global_destruction");
};
$@;
};
die $e if $e && $e !~ /object version|loadable object/;
+
+ return $e ? 0 : 1;
}
+sub _load_pure_perl {
+ require Sub::Identify;
+ Sub::Identify->import('get_code_info');
+
+ *subname = sub { $_[1] };
+ *in_global_destruction = sub () { !1 }
+}
+
+
{
# Metaclasses are singletons, so we cache them here.
# there is no need to worry about destruction though
# because I don't yet see a good reason to do so.
}
-sub load_class {
- my $class = shift;
+sub load_first_existing_class {
+ my @classes = @_
+ or return;
- unless ( _is_valid_class_name($class) ) {
- my $display = defined($class) ? $class : 'undef';
- confess "Invalid class name ($display)";
+ foreach my $class (@classes) {
+ unless ( _is_valid_class_name($class) ) {
+ my $display = defined($class) ? $class : 'undef';
+ confess "Invalid class name ($display)";
+ }
}
- # if the class is not already loaded in the symbol table..
- unless (is_class_loaded($class)) {
- # require it
- my $e = do { local $@; eval "require $class"; $@ };
- confess "Could not load class ($class) because : $e" if $e;
- }
+ my $found;
+ my %exceptions;
+ for my $class (@classes) {
+ my $e = _try_load_one_class($class);
- # initialize a metaclass if necessary
- unless (does_metaclass_exist($class)) {
- my $e = do { local $@; eval { Class::MOP::Class->initialize($class) }; $@ };
- confess "Could not initialize class ($class) because : $e" if $e;
+ if ($e) {
+ $exceptions{$class} = $e;
+ }
+ else {
+ $found = $class;
+ last;
+ }
}
- return get_metaclass_by_name($class) if defined wantarray;
+ return $found if $found;
+
+ confess join(
+ "\n",
+ map {
+ sprintf(
+ "Could not load class (%s) because : %s", $_,
+ $exceptions{$_}
+ )
+ } @classes
+ );
+}
+
+sub _try_load_one_class {
+ my $class = shift;
+
+ return if is_class_loaded($class);
+
+ my $file = $class . '.pm';
+ $file =~ s{::}{/}g;
+
+ return do {
+ local $@;
+ eval { require($file) };
+ $@;
+ };
+}
+
+sub load_class {
+ my $class = load_first_existing_class($_[0]);
+ return get_metaclass_by_name($class) || $class;
}
sub _is_valid_class_name {
))
);
+Class::MOP::Method->meta->add_attribute(
+ Class::MOP::Attribute->new('original_method' => (
+ reader => { 'original_method' => \&Class::MOP::Method::original_method },
+ writer => { '_set_original_method' => \&Class::MOP::Method::_set_original_method },
+ ))
+);
+
Class::MOP::Method->meta->add_method('clone' => sub {
my $self = shift;
- $self->meta->clone_object($self, @_);
+ my $clone = $self->meta->clone_object($self, @_);
+ $clone->_set_original_method($self);
+ return $clone;
});
## --------------------------------------------------------
=head2 Utility functions
+Note that these are all called as B<functions, not methods>.
+
=over 4
=item B<load_class ($class_name)>
=item B<check_package_cache_flag ($pkg)>
+B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!>
+
This will return an integer that is managed by C<Class::MOP::Class>
to determine if a module's symbol table has been altered.
=item B<get_code_info ($code)>
+B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!>
+
This function returns two values, the name of the package the C<$code>
is from and the name of the C<$code> itself. This is used by several
elements of the MOP to detemine where a given C<$code> reference is from.
=item B<in_global_destruction>
+B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!>
+
If L<Devel::GlobalDestruction> is available, this returns true under global
destruction.
Otherwise it's a constant returning false.
+=item B<load_first_existing_class ($class_name, [$class_name, ...])>
+
+B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!>
+
+Given a list of class names, this function will attempt to load each
+one in turn.
+
+If it finds a class it can load, it will return that class' name.
+If none of the classes can be loaded, it will throw an exception.
+
=back
=head2 Metaclass cache functions
Brandon (blblack) Black
+Florian (rafl) Ragwitz
+
Guillermo (groditi) Roditi
Matt (mst) Trout