| Title: Arithmetic Operator
Description: None
Copyright (c) 1999 Steven J. Metsker.
Copyright (c) 2001 The Open For Business Project - www.ofbiz.org
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An ArithmeticOperator represents an arithmetic operation
that will perform itself as part of a proof.
An ArithmeticOperator has an operator and two terms. The
operator must be '+', '-', '/', '*' or '%', or else the
eval() value of this object will always be 0. The
terms may be other arithmetic operators, variables, or
number structures.
For example, an ArithmeticOperator might be appear in a
comparison, as follows:
>(+(X, 3), 42)
The arithmetic operator will have a valid value if X is
instantiated to a NumberStructure object. If X is
instantiated to, say, 40, then the arithmetic operator's
reply to eval() will be 47, and the comparison
will succeed.
author:
Steven J. Metsker
version:
1.0 |
