X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMoo.git;a=blobdiff_plain;f=lib%2FMoo%2FRole.pm;h=61d66da20de0ec1b3d1c7e38b0f3cd7b08ad97aa;hp=c27c025f5f2d376ff42e69fe2ac1b362f78cb454;hb=141b507ace5957c098c52ceb7afaf21d5928a02d;hpb=1ba114550da04faf77252207e6df621c37d07da7

diff --git a/lib/Moo/Role.pm b/lib/Moo/Role.pm
index c27c025..61d66da 100644
--- a/lib/Moo/Role.pm
+++ b/lib/Moo/Role.pm
@@ -4,39 +4,229 @@ use strictures 1;
 use Moo::_Utils;
 use base qw(Role::Tiny);
 
+require Moo::sification;
+
 BEGIN { *INFO = \%Role::Tiny::INFO }
 
 our %INFO;
 
+sub _install_tracked {
+  my ($target, $name, $code) = @_;
+  $INFO{$target}{exports}{$name} = $code;
+  _install_coderef "${target}::${name}" => "Moo::Role::${name}" => $code;
+}
+
 sub import {
   my $target = caller;
+  my ($me) = @_;
   strictures->import;
   return if $INFO{$target}; # already exported into this package
+  $INFO{$target} = {};
   # get symbol table reference
   my $stash = do { no strict 'refs'; \%{"${target}::"} };
-  *{_getglob "${target}::has"} = sub {
-    my ($name, %spec) = @_;
-    ($INFO{$target}{accessor_maker} ||= do {
-      require Method::Generate::Accessor;
-      Method::Generate::Accessor->new
-    })->generate_method($target, $name, \%spec);
-    $INFO{$target}{attributes}{$name} = \%spec;
+  _install_tracked $target => has => sub {
+    my ($name_proto, %spec) = @_;
+    my $name_isref = ref $name_proto eq 'ARRAY';
+    foreach my $name ($name_isref ? @$name_proto : $name_proto) {
+      my $spec_ref = $name_isref ? +{%spec} : \%spec;
+      ($INFO{$target}{accessor_maker} ||= do {
+        require Method::Generate::Accessor;
+        Method::Generate::Accessor->new
+      })->generate_method($target, $name, $spec_ref);
+      push @{$INFO{$target}{attributes}||=[]}, $name, $spec_ref;
+      $me->_maybe_reset_handlemoose($target);
+    }
+  };
+  # install before/after/around subs
+  foreach my $type (qw(before after around)) {
+    _install_tracked $target => $type => sub {
+      require Class::Method::Modifiers;
+      push @{$INFO{$target}{modifiers}||=[]}, [ $type => @_ ];
+      $me->_maybe_reset_handlemoose($target);
+    };
+  }
+  _install_tracked $target => requires => sub {
+    push @{$INFO{$target}{requires}||=[]}, @_;
+    $me->_maybe_reset_handlemoose($target);
+  };
+  _install_tracked $target => with => sub {
+    $me->apply_roles_to_package($target, @_);
+    $me->_maybe_reset_handlemoose($target);
   };
-  goto &Role::Tiny::import;
+  # grab all *non-constant* (stash slot is not a scalarref) subs present
+  # in the symbol table and store their refaddrs (no need to forcibly
+  # inflate constant subs into real subs) - also add '' to here (this
+  # is used later) with a map to the coderefs in case of copying or re-use
+  my @not_methods = ('', map { *$_{CODE}||() } grep !ref($_), values %$stash);
+  @{$INFO{$target}{not_methods}={}}{@not_methods} = @not_methods;
+  # a role does itself
+  $Role::Tiny::APPLIED_TO{$target} = { $target => undef };
+
+  if ($INC{'Moo/HandleMoose.pm'}) {
+    Moo::HandleMoose::inject_fake_metaclass_for($target);
+  }
+}
+
+sub unimport {
+  my $target = caller;
+  _unimport_coderefs($target, $INFO{$target});
+}
+
+sub _maybe_reset_handlemoose {
+  my ($class, $target) = @_;
+  if ($INC{"Moo/HandleMoose.pm"}) {
+    Moo::HandleMoose::maybe_reinject_fake_metaclass_for($target);
+  }
+}
+
+sub _inhale_if_moose {
+  my ($self, $role) = @_;
+  _load_module($role);
+  my $meta;
+  if (!$INFO{$role}
+      and (
+        $INC{"Moose.pm"}
+        and $meta = Class::MOP::class_of($role)
+      )
+      or (
+        $INC{"Mouse.pm"}
+        and $meta = Mouse::Util::find_meta($role)
+     )
+  ) {
+    $INFO{$role}{methods} = {
+      map +($_ => $role->can($_)),
+        grep !$meta->get_method($_)->isa('Class::MOP::Method::Meta'),
+          $meta->get_method_list
+    };
+    $Role::Tiny::APPLIED_TO{$role} = {
+      map +($_->name => 1), $meta->calculate_all_roles
+    };
+    $INFO{$role}{requires} = [ $meta->get_required_method_list ];
+    $INFO{$role}{attributes} = [
+      map +($_ => do {
+        my $spec = { %{$meta->get_attribute($_)} };
+
+        if ($spec->{isa}) {
+
+          my $get_constraint = do {
+            my $pkg = $meta->isa('Mouse::Meta::Role')
+                        ? 'Mouse::Util::TypeConstraints'
+                        : 'Moose::Util::TypeConstraints';
+            _load_module($pkg);
+            $pkg->can('find_or_create_isa_type_constraint');
+          };
+
+          my $tc = $get_constraint->($spec->{isa});
+          my $check = $tc->_compiled_type_constraint;
+
+          $spec->{isa} = sub {
+            &$check or die "Type constraint failed for $_[0]"
+          };
+
+          if ($spec->{coerce}) {
+
+             # Mouse has _compiled_type_coercion straight on the TC object
+             $spec->{coerce} = $tc->${\(
+               $tc->can('coercion')||sub { $_[0] }
+             )}->_compiled_type_coercion;
+          }
+        }
+        $spec;
+      }), $meta->get_attribute_list
+    ];
+    my $mods = $INFO{$role}{modifiers} = [];
+    foreach my $type (qw(before after around)) {
+      # Mouse pokes its own internals so we have to fall back to doing
+      # the same thing in the absence of the Moose API method
+      my $map = $meta->${\(
+        $meta->can("get_${type}_method_modifiers_map")
+        or sub { shift->{"${type}_method_modifiers"} }
+      )};
+      foreach my $method (keys %$map) {
+        foreach my $mod (@{$map->{$method}}) {
+          push @$mods, [ $type => $method => $mod ];
+        }
+      }
+    }
+    require Class::Method::Modifiers if @$mods;
+    $INFO{$role}{inhaled_from_moose} = 1;
+  }
+}
+
+sub _maybe_make_accessors {
+  my ($self, $role, $target) = @_;
+  my $m;
+  if ($INFO{$role}{inhaled_from_moose}
+      or $INC{"Moo.pm"}
+      and $m = Moo->_accessor_maker_for($target)
+      and ref($m) ne 'Method::Generate::Accessor') {
+    $self->_make_accessors($role, $target);
+  }
+}
+
+sub _make_accessors_if_moose {
+  my ($self, $role, $target) = @_;
+  if ($INFO{$role}{inhaled_from_moose}) {
+    $self->_make_accessors($role, $target);
+  }
+}
+
+sub _make_accessors {
+  my ($self, $role, $target) = @_;
+  my $acc_gen = ($Moo::MAKERS{$target}{accessor} ||= do {
+    require Method::Generate::Accessor;
+    Method::Generate::Accessor->new
+  });
+  my $con_gen = $Moo::MAKERS{$target}{constructor};
+  my @attrs = @{$INFO{$role}{attributes}||[]};
+  while (my ($name, $spec) = splice @attrs, 0, 2) {
+    # needed to ensure we got an index for an arrayref based generator
+    if ($con_gen) {
+      $spec = $con_gen->all_attribute_specs->{$name};
+    }
+    $acc_gen->generate_method($target, $name, $spec);
+  }
+}
+
+sub apply_roles_to_package {
+  my ($me, $to, @roles) = @_;
+  foreach my $role (@roles) {
+      $me->_inhale_if_moose($role);
+  }
+  $me->SUPER::apply_roles_to_package($to, @roles);
 }
 
-sub apply_role_to_package {
-  my ($me, $role, $to) = @_;
-  $me->SUPER::apply_role_to_package($role, $to);
+sub apply_single_role_to_package {
+  my ($me, $to, $role) = @_;
+  $me->_inhale_if_moose($role);
   $me->_handle_constructor($to, $INFO{$role}{attributes});
+  $me->_maybe_make_accessors($role, $to);
+  $me->SUPER::apply_single_role_to_package($to, $role);
 }
 
 sub create_class_with_roles {
   my ($me, $superclass, @roles) = @_;
 
-  my $new_name = join('+', $superclass, my $compose_name = join '+', @roles);
+  my $new_name = join(
+    '__WITH__', $superclass, my $compose_name = join '__AND__', @roles
+  );
+
   return $new_name if $Role::Tiny::COMPOSED{class}{$new_name};
 
+  foreach my $role (@roles) {
+      $me->_inhale_if_moose($role);
+  }
+
+  my $m;
+  if ($INC{"Moo.pm"}
+      and $m = Moo->_accessor_maker_for($superclass)
+      and ref($m) ne 'Method::Generate::Accessor') {
+    # old fashioned way time.
+    *{_getglob("${new_name}::ISA")} = [ $superclass ];
+    $me->apply_roles_to_package($new_name, @roles);
+    return $new_name;
+  }
+
   require Sub::Quote;
 
   $me->SUPER::create_class_with_roles($superclass, @roles);
@@ -45,30 +235,104 @@ sub create_class_with_roles {
     die "${role} is not a Role::Tiny" unless my $info = $INFO{$role};
   }
 
+  $Moo::MAKERS{$new_name} = {};
+
   $me->_handle_constructor(
-    $new_name, { map %{$INFO{$_}{attributes}||{}}, @roles }
+    $new_name, [ map @{$INFO{$_}{attributes}||[]}, @roles ], $superclass
   );
 
   return $new_name;
 }
 
+sub _composable_package_for {
+  my ($self, $role) = @_;
+  my $composed_name = 'Role::Tiny::_COMPOSABLE::'.$role;
+  return $composed_name if $Role::Tiny::COMPOSED{role}{$composed_name};
+  $self->_make_accessors_if_moose($role, $composed_name);
+  $self->SUPER::_composable_package_for($role);
+}
+
 sub _install_single_modifier {
   my ($me, @args) = @_;
   _install_modifier(@args);
 }
 
 sub _handle_constructor {
-  my ($me, $to, $attr_info) = @_;
-  return unless $attr_info && keys %$attr_info;
+  my ($me, $to, $attr_info, $superclass) = @_;
+  return unless $attr_info && @$attr_info;
   if ($INFO{$to}) {
-    @{$INFO{$to}{attributes}||={}}{keys %$attr_info} = values %$attr_info;
+    push @{$INFO{$to}{attributes}||=[]}, @$attr_info;
   } else {
     # only fiddle with the constructor if the target is a Moo class
     if ($INC{"Moo.pm"}
-        and my $con = Moo->_constructor_maker_for($to)) {
-      $con->register_attribute_specs(%$attr_info);
+        and my $con = Moo->_constructor_maker_for($to, $superclass)) {
+      # shallow copy of the specs since the constructor will assign an index
+      $con->register_attribute_specs(map ref() ? { %$_ } : $_, @$attr_info);
     }
   }
 }
 
 1;
+
+=head1 NAME
+
+Moo::Role - Minimal Object Orientation support for Roles
+
+=head1 SYNOPSIS
+
+ package My::Role;
+
+ use Moo::Role;
+
+ sub foo { ... }
+
+ sub bar { ... }
+
+ has baz => (
+   is => 'ro',
+ );
+
+ 1;
+
+And elsewhere:
+
+ package Some::Class;
+
+ use Moo;
+
+ # bar gets imported, but not foo
+ with('My::Role');
+
+ sub foo { ... }
+
+ 1;
+
+=head1 DESCRIPTION
+
+C<Moo::Role> builds upon L<Role::Tiny>, so look there for most of the
+documentation on how this works.  The main addition here is extra bits to make
+the roles more "Moosey;" which is to say, it adds L</has>.
+
+=head1 IMPORTED SUBROUTINES
+
+See L<Role::Tiny/IMPORTED SUBROUTINES> for all the other subroutines that are
+imported by this module.
+
+=head2 has
+
+ has attr => (
+   is => 'ro',
+ );
+
+Declares an attribute for the class to be composed into.  See
+L<Moo/has> for all options.
+
+=head1 AUTHORS
+
+See L<Moo> for authors.
+
+=head1 COPYRIGHT AND LICENSE
+
+See L<Moo> for the copyright and license.
+
+=cut