shh.util
Class Cons

Object
  Cons

public class Cons

extends Object

Partial support for cons, the basic data structure in Lisp. Defines equals(java.lang.Object) on conses to mean the corresponding members are equal recursively, like Lisp's equal.

Author:

Mark McConnell

Constructor Summary

Cons(Object car_, Object cdr_)

Method Summary

Object	car() Returns the first element of the cons.
Object	cdr() Returns the second element of the cons.
boolean	equals(Object o) Like Lisp's equal, this tests for equality of the members.
int	hashCode() Consistent with equals(java.lang.Object).
void	rplaca(Object newCar) Resets the first element of the cons.
void	rplacd(Object newCdr) Resets the second element of the cons.
String	toString()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Cons

public Cons(Object car_,
            Object cdr_)

Method Detail

car

public final Object car()

Returns the first element of the cons.

cdr

public final Object cdr()

Returns the second element of the cons.

rplaca

public void rplaca(Object newCar)

Resets the first element of the cons.

rplacd

public void rplacd(Object newCdr)

Resets the second element of the cons.

equals

public boolean equals(Object o)

Like Lisp's equal, this tests for equality of the members.

hashCode

public int hashCode()

Consistent with equals(java.lang.Object).

toString

public String toString()