class Paludis::Filter::SupportsAction

VALUE
    filter_supports_action_new(VALUE self, VALUE action_class)
    {
        Filter * ptr(0);
        try
        {
            if (Qtrue == rb_funcall2(action_class, rb_intern("<="), 1, install_action_value_ptr()))
                ptr = new filter::SupportsAction<InstallAction>();
            else if (Qtrue == rb_funcall2(action_class, rb_intern("<="), 1, uninstall_action_value_ptr()))
                ptr = new filter::SupportsAction<UninstallAction>();
            else if (Qtrue == rb_funcall2(action_class, rb_intern("<="), 1, pretend_action_value_ptr()))
                ptr = new filter::SupportsAction<PretendAction>();
            else if (Qtrue == rb_funcall2(action_class, rb_intern("<="), 1, config_action_value_ptr()))
                ptr = new filter::SupportsAction<ConfigAction>();
            else if (Qtrue == rb_funcall2(action_class, rb_intern("<="), 1, fetch_action_value_ptr()))
                ptr = new filter::SupportsAction<FetchAction>();
            else if (Qtrue == rb_funcall2(action_class, rb_intern("<="), 1, info_action_value_ptr()))
                ptr = new filter::SupportsAction<InfoAction>();
            else if (Qtrue == rb_funcall2(action_class, rb_intern("<="), 1, pretend_fetch_action_value_ptr()))
                ptr = new filter::SupportsAction<PretendFetchAction>();
            else
                rb_raise(rb_eTypeError, "Can't convert %s into an Action subclass", rb_obj_classname(action_class));

            VALUE data(Data_Wrap_Struct(self, 0, &Common<Filter>::free, ptr));
            rb_obj_call_init(data, 1, &action_class);
            return data;
        }
        catch (const std::exception & e)
        {
            delete ptr;
            exception_to_ruby_exception(e);
        }
    }

    /*
     * call-seq:
     *     new(PackageID) -> Filter
     *
     * Create a Filter that accepts packages that have the same slot as the given ID.
     */
    VALUE
    filter_same_slot_new(VALUE self, VALUE id_v)
    {
        Filter * ptr(0);
        try
        {
            std::shared_ptr<const PackageID> id = value_to_package_id(id_v);
            ptr = new filter::SameSlot(id);
            VALUE data(Data_Wrap_Struct(self, 0, &Common<Filter>::free, ptr));
            rb_obj_call_init(data, 1, &id_v);
            return data;
        }
        catch (const std::exception & e)
        {
            delete ptr;
            exception_to_ruby_exception(e);
        }
    }

    /*
     * call-seq:
     *     new(slot) -> Filter
     *
     * Create a Filter that accepts packages that have a given slot.
     */
    VALUE
    filter_slot_new(VALUE self, VALUE s_v)
    {
        Filter * ptr(0);
        try
        {
            SlotName s(std::string(StringValuePtr(s_v)));
            ptr = new filter::Slot(s);
            VALUE data(Data_Wrap_Struct(self, 0, &Common<Filter>::free, ptr));
            rb_obj_call_init(data, 1, &s_v);
            return data;
        }
        catch (const std::exception & e)
        {
            delete ptr;
            exception_to_ruby_exception(e);
        }
    }

    /*
     * call-seq:
     *     new() -> Filter
     *
     * Create a Filter that accepts packages that have no slot.
     */
    VALUE
    filter_no_slot_new(VALUE self_v)
    {
        Filter * ptr(0);
        try
        {
            ptr = new filter::NoSlot;
            VALUE data(Data_Wrap_Struct(self_v, 0, &Common<Filter>::free, ptr));
            rb_obj_call_init(data, 0, &self_v);
            return data;
        }
        catch (const std::exception & e)
        {
            delete ptr;
            exception_to_ruby_exception(e);
        }
    }

    void do_register_filter()
    {
        /*
         * Document-module: Paludis::Filter
         *
         * Collection of classes that restrict the results of an
         * Environment selection.
         */
        c_filter_module = rb_define_module_under(c_paludis_module, "Filter");

        /*
         * Document-class: Paludis::Filter::Filter
         *
         * Filter for an Environment selection.
         */
        c_filter = rb_define_class_under(c_filter_module, "Filter", rb_cObject);
        rb_undef_alloc_func(c_filter);
        rb_funcall(c_filter, rb_intern("private_class_method"), 1, rb_str_new2("new"));
        rb_define_method(c_filter, "initialize", filter_init, -1);
        rb_define_method(c_filter, "to_s", template_methods, 0);

        /*
         * Document-class: Paludis::Filter::All
         *
         * Accept all packages.
         */
        c_filter_all = rb_define_class_under(c_filter_module, "All", c_filter);
        rb_undef_alloc_func(c_filter_all);
        rb_define_singleton_method(c_filter_all, "new", filter_all_new, 0);

        /*
         * Document-class: Paludis::Filter::NotMasked
         *
         * Accept unmasked packages.
         */
        c_filter_not_masked = rb_define_class_under(c_filter_module, "NotMasked", c_filter);
        rb_undef_alloc_func(c_filter_not_masked);
        rb_define_singleton_method(c_filter_not_masked, "new", filter_not_masked_new, 0);

        /*
         * Document-class: Paludis::Filter::InstalledAtRoot
         *
         * Accept packages installed at a particular root.
         */
        c_filter_installed_at_root = rb_define_class_under(c_filter_module, "InstalledAtRoot", c_filter);
        rb_undef_alloc_func(c_filter_installed_at_root);
        rb_define_singleton_method(c_filter_installed_at_root, "new", filter_installed_at_root_new, 1);

        /*
         * Document-class: Paludis::Filter::And
         *
         * Accept packages that match both filters.
         */
        c_filter_and = rb_define_class_under(c_filter_module, "And", c_filter);
        rb_undef_alloc_func(c_filter_and);
        rb_define_singleton_method(c_filter_and, "new", filter_and_new, 2);

        /*
         * Document-class: Paludis::Filter::SupportsAction
         *
         * Accept packages that support a particular Action.
         */
        c_filter_supports_action = rb_define_class_under(c_filter_module, "SupportsAction", c_filter);
        rb_undef_alloc_func(c_filter_supports_action);
        rb_define_singleton_method(c_filter_supports_action, "new", filter_supports_action_new, 1);

        /*
         * Document-class: Paludis::Filter::SameSlot
         *
         * Accept packages that have the same slot as a given PackageID.
         */
        c_filter_same_slot = rb_define_class_under(c_filter_module, "SameSlot", c_filter);
        rb_define_singleton_method(c_filter_same_slot, "new", filter_same_slot_new, 1);

        /*
         * Document-class: Paludis::Filter::Slot
         *
         * Accept packages that have a particular slot.
         */
        c_filter_slot = rb_define_class_under(c_filter_module, "Slot", c_filter);
        rb_define_singleton_method(c_filter_slot, "new", filter_slot_new, 1);

        /*
         * Document-class: Paludis::Filter::NoSlot
         *
         * Accept packages that have no slot.
         */
        c_filter_no_slot = rb_define_class_under(c_filter_module, "NoSlot", c_filter);
        rb_define_singleton_method(c_filter_no_slot, "new", filter_no_slot_new, 0);
    }
}