class Rubydex::Namespace

static VALUE rdxr_declaration_ancestors(VALUE self) {
    if (!rb_block_given_p()) {
        return rb_enumeratorize(self, rb_str_new2("ancestors"), 0, NULL);
    }

    HandleData *data;
    void *graph = rdxi_graph_from_handle(self, &data);

    void *iter = rdx_declaration_ancestors(graph, data->id);
    if (iter == NULL) {
        rb_raise(rb_eRuntimeError, "failed to create iterator");
    }

    VALUE args = rb_ary_new_from_args(2, data->graph_obj, ULL2NUM((uintptr_t)iter));
    rb_ensure(rdxi_declarations_yield, args, rdxi_declarations_ensure, args);

    return self;
}

static VALUE rdxr_declaration_descendants(VALUE self) {
    if (!rb_block_given_p()) {
        return rb_enumeratorize(self, rb_str_new2("descendants"), 0, NULL);
    }

    HandleData *data;
    void *graph = rdxi_graph_from_handle(self, &data);

    void *iter = rdx_declaration_descendants(graph, data->id);
    if (iter == NULL) {
        rb_raise(rb_eRuntimeError, "failed to create iterator");
    }

    VALUE args = rb_ary_new_from_args(2, data->graph_obj, ULL2NUM((uintptr_t)iter));
    rb_ensure(rdxi_declarations_yield, args, rdxi_declarations_ensure, args);

    return self;
}

static VALUE rdxr_declaration_find_member(int argc, VALUE *argv, VALUE self) {
    VALUE member, opts;
    rb_scan_args(argc, argv, "1:", &member, &opts);
    Check_Type(member, T_STRING);

    bool only_inherited = false;
    if (!NIL_P(opts)) {
        ID kwarg_id = rb_intern("only_inherited");
        VALUE kwarg_val;
        rb_get_kwargs(opts, &kwarg_id, 0, 1, &kwarg_val);

        if (kwarg_val != Qundef) {
            only_inherited = RTEST(kwarg_val);
        }
    }

    HandleData *data;
    void *graph = rdxi_graph_from_handle(self, &data);

    const CDeclaration *decl = rdx_declaration_find_member(graph, data->id, StringValueCStr(member), only_inherited);
    if (decl == NULL) {
        return Qnil;
    }

    VALUE decl_class = rdxi_declaration_class_for_kind(decl->kind);
    VALUE result_argv[] = {data->graph_obj, ULL2NUM(decl->id)};
    free_c_declaration(decl);

    return rb_class_new_instance(2, result_argv, decl_class);
}

# File lib/rubydex/declaration.rb, line 25
def has_ancestor?(*ancestor_names)
  ancestors.any? { |ancestor| ancestor_names.include?(ancestor.name) }
end

static VALUE rdxr_declaration_member(VALUE self, VALUE name) {
    HandleData *data;
    void *graph = rdxi_graph_from_handle(self, &data);

    if (TYPE(name) != T_STRING) {
        rb_raise(rb_eTypeError, "expected String");
    }

    const CDeclaration *decl = rdx_declaration_member(graph, data->id, StringValueCStr(name));
    if (decl == NULL) {
        return Qnil;
    }

    VALUE decl_class = rdxi_declaration_class_for_kind(decl->kind);
    VALUE argv[] = {data->graph_obj, ULL2NUM(decl->id)};
    free_c_declaration(decl);

    return rb_class_new_instance(2, argv, decl_class);
}

static VALUE rdxr_declaration_members(VALUE self) {
    if (!rb_block_given_p()) {
        return rb_enumeratorize(self, rb_str_new2("members"), 0, NULL);
    }

    HandleData *data;
    void *graph = rdxi_graph_from_handle(self, &data);

    void *iter = rdx_declaration_members(graph, data->id);
    if (iter == NULL) {
        rb_raise(rb_eRuntimeError, "failed to create iterator");
    }

    VALUE args = rb_ary_new_from_args(2, data->graph_obj, ULL2NUM((uintptr_t)iter));
    rb_ensure(rdxi_declarations_yield, args, rdxi_declarations_ensure, args);

    return self;
}

static VALUE rdxr_constant_declaration_references(VALUE self) {
    if (!rb_block_given_p()) {
        return rb_enumeratorize_with_size(self, rb_str_new2("references"), 0, NULL,
                                          constant_declaration_references_size);
    }

    HandleData *data;
    void *graph = rdxi_graph_from_handle(self, &data);

    void *iter = rdx_declaration_constant_references_iter_new(graph, data->id);
    if (iter == NULL) {
        rb_raise(rb_eRuntimeError, "Declaration not found");
    }

    VALUE args = rb_ary_new_from_args(2, data->graph_obj, ULL2NUM((uintptr_t)iter));
    rb_ensure(rdxi_constant_references_yield, args, rdxi_constant_references_ensure, args);

    return self;
}

static VALUE rdxr_declaration_singleton_class(VALUE self) {
    HandleData *data;
    void *graph = rdxi_graph_from_handle(self, &data);
    const CDeclaration *decl = rdx_declaration_singleton_class(graph, data->id);

    if (decl == NULL) {
        return Qnil;
    }

    VALUE decl_class = rdxi_declaration_class_for_kind(decl->kind);
    VALUE argv[] = {data->graph_obj, ULL2NUM(decl->id)};
    free_c_declaration(decl);

    return rb_class_new_instance(2, argv, decl_class);
}