Objects are the only way in TOM to create an aggregate value--there is no such thing as a struct.
ByteArray, so not all objects are of the same kind.
The default value of an object-typed variable is the invalid reference,
nil. The type of
object_type: class_name | `id' | `class' `(' object_type `)' | `instance' `(' object_type `)' ;
object_type is a
class_name; this indicates the
instance of the indicated class.
id indicates the type of
the actual receiver (see section The id type). The variation with a `class'
or `instance' shifts the meta level into the specified direction.
Foo(or an instance of a subclass of
Fooclass object (or the class object of a subclass of
As the receiver of a method invocation, a
class_name denotes the
class object (see section Method invocations).
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