class __attribute__()

in ComponentKit/LayoutComponents/CKZStackComponent.h [71:132]

• 35 lines of code
• 3 McCabe index (conditional complexity)

class __attribute__((__may_alias__)) ZStackComponentBuilder
    : public BuilderBase<ZStackComponentBuilder, PropsBitmap> {
 public:
  ZStackComponentBuilder() = default;
      ZStackComponentBuilder(const CK::ComponentSpecContext &context) : BuilderBase<ZStackComponentBuilder, PropsBitmap>{context} { }

  ~ZStackComponentBuilder() = default;

  /**
   Adds a child component with default gravity to this stack.

   @param c component to add.

   @note  Nil components are ignored and are not added to the stack.
  */
  auto &child(NS_RELEASES_ARGUMENT CKComponent *_Nullable c)
  {
    if (c != nil) {
      auto const stackChild = [[CKZStackComponentChild alloc] initWithComponent:c];
      [_children addObject:stackChild];
    }
    return reinterpret_cast<
    ZStackComponentBuilder<PropsBitmap | ZStackComponentPropId::children> &>(*this);
  }

  /**
   Adds a child component with the specified gravity to this stack.

   @param c component to add.
   @param g gravity that will be used to position the component.

   @note  Nil components are ignored and are not added to the stack.
  */
  auto &child(NS_RELEASES_ARGUMENT CKComponent *_Nullable c, CKZStackComponentGravity g)
  {
    if (c != nil) {
      auto const stackChild = [[CKZStackComponentChild alloc] initWithComponent:c gravity:g];
      [_children addObject:stackChild];
    }
    return reinterpret_cast<
    ZStackComponentBuilder<PropsBitmap | ZStackComponentPropId::children> &>(*this);
  }

 private:
  friend BuilderBase<ZStackComponentBuilder, PropsBitmap>;

  /**
  Creates a new component instance with specified properties.

  @note  This method must @b not be called more than once on a given component builder instance.
  */
  NS_RETURNS_RETAINED auto _build() noexcept -> CKZStackComponent *_Nonnull
  {
    constexpr auto hasChildren = PropBitmap::isSet(PropsBitmap, ZStackComponentPropId::children);
    static_assert(hasChildren, "At least one child must be added to the stack using .child().");

    return [[CKZStackComponent alloc] initWithChildren:_children];
  }

 private:
  NSMutableArray<CKZStackComponentChild *> *_Nonnull _children = [NSMutableArray array];
};