A class that cannot have direct instances. To define an abstract class, you provide the abstract class adjective in the define class form. All superclasses of an abstract class must also be abstract.

The allocation of a slot determines where the storage for the slot’s value is allocated, and determines which instances share the value of the slot. There are four kinds of allocation: instance, class [..]

Methods that cannot be ordered as more specific or less specific than one another, in the method dispatch.

The act of setting the value of an existing variable or slot, or of setting an element of a collection. The assignment operator is :=.

An association between a name and an object. For example, there is a binding that associates the name of a constant and the object that is the value of the constant. The names of functions, module var [..]

A region of program code that delimits the scope of all local variables declared inside it. Bodies can be nested. An body is begun implicitly with define method, and is ended by the corresponding end. [..]

A class provided by Dylan, such as <object>, <integer>, or <string>.

A definition of a type of other objects, which are called its instances. A class defines the slots of its instances. Dylan provides built-in classes, and users can define new classes. When you define [..]

For a particular class, a list of the class and all its superclasses, ordered from most specific (the class itself) to least specific (the <object> class).

A method that closes over some local variables. The closure can access the local variables which existed when the closure was created. The ability to dynamically create and return closures that can ac [..]