# The Boolean interface

Last modified on Thu Sep 15 11:00:27 PDT 1994 by heydon

modified on Tue May 11 16:37:06 PDT 1993 by swart

modified on Thu Apr 22 09:57:00 PDT 1993 by mcjones

modified on Thu Nov 2 21:55:31 1989 by muller

modified on Fri Sep 29 15:44:47 1989 by kalsow

modified on Sun May 7 15:35:59 1989 by stolfi

    INTERFACE Boolean;

Some standard operations on BOOLEAN for use by Generic modules.

Index: booleans, generics

    IMPORT Word;

    TYPE T = BOOLEAN;

    CONST Brand = "Boolean";

    PROCEDURE Compare (a, b: T): [-1..1];

== RETURN (a - b)

    PROCEDURE Equal (a, b: T): BOOLEAN;

== RETURN (a = b)

    PROCEDURE Hash (a: T): Word.T;

== RETURN ORD (a)

    END Boolean.