| Class | Description | 
|---|---|
| Packer | 
Packer is designed to implement the RubyArray.pack(String). | 
| Unpacker | 
Unpacker is designed to implement the
 RubyString.unpack(String). | 
| Enum | Description | 
|---|---|
| Directive | 
Directive defines available directives for
 RubyArray.pack(String). |