Initial Values

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Initial Values

The initial value and sequence expressions for an instance of the class are evaluated in an environment that comprises

the environment of the class*/name expression;
all internal instance variables and initialization variables of the class declaration;
this-variable (usually this, bound to the object itself); and
super-init-variable (usually super-init, bound to an initialization procedure for the superclass).

The initial value and sequence expressions are evaluated each time an object of the class is created. The expressions are evaluated in the order in which they occur in the class*/name expression (across clauses and including sequence clauses).

Before an initial value expression has been evaluated, the value of the corresponding instance variable is initialized to undefined (see section 4.1). Because all of the instance variables have mutually-recursive scopes, the undefined value of an instance variable can be exposed. The initialization process is described in more detail in section 6.4.

PLT