pstypes
Interface PSEqualityOperator

All Superinterfaces:

PSObject, PSOperator

All Known Implementing Classes:

PSEq, PSGe, PSGt, PSLe, PSLt, PSNe

public interface PSEqualityOperator

extends PSOperator

An object that implements this interface is defined as an equality operator.

This interface defines the group of equality operators.

All the equality operators must check if the input taken is valid and determine on which type of literals the equality functions will be perfomed.

Method Summary

void	action(PSStack s) Executes the action as it is intented.

Methods inherited from interface pstypes.PSOperator

getOperatorToken, isValid

Method Detail

action

public void action(PSStack s)

Executes the action as it is intented.

The implementor determines the kind of the equality that will be held as well as the type of operands needed.Another thing that has to be checked is the necessery equlity the object must have,as far as theirs types are concerned.

Precondition : A valid stack is given to method.
Postcondition : The implemented action will be executed.

Parameters:

s - The stack where the operands are stored.