org.oakgp.function.compare

Class LessThan

java.lang.Object

org.oakgp.function.compare.LessThan

All Implemented Interfaces:

Function

public final class LessThan
extends Object

Determines if the object represented by the first argument is less than the object represented by the second.

Method Summary

Modifier and Type	Method and Description
static LessThan	create(Type t) Returns a LessThan for comparing functions of the specified type.
Object	evaluate(Arguments arguments, Assignments assignments) Returns the result of applying this operation to the specified Arguments and Assignments.
protected boolean	evaluate(int diff)
String	getDisplayName() Returns the String value to use in the textual representation of this function.
Signature	getSignature() Returns the return type and argument types associated with this function.
Node	simplify(Arguments arguments) Attempts to find a simplified alternative to applying this function to the specified arguments.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.oakgp.function.Function

isPure

Method Detail

create

public static LessThan create(Type t)

Returns a LessThan for comparing functions of the specified type.

If this is the first call to #create(Type) with the specified Type then a new instance will be created and returned. If there has previously been calls to #create(Type) for the specified Type then the existing instance will be returned.

evaluate

protected boolean evaluate(int diff)

getDisplayName

public String getDisplayName()

Description copied from interface: Function

Returns the String value to use in the textual representation of this function.

evaluate

public final Object evaluate(Arguments arguments,
                             Assignments assignments)

Description copied from interface: Function

Returns the result of applying this operation to the specified Arguments and Assignments.

Specified by:

evaluate in interface Function

Parameters:

arguments - represents the arguments to apply to the operation

assignments - represents values assigned to variables belonging to arguments

Returns:

the result of applying this operation to the arguments and assignments

getSignature

public final Signature getSignature()

Description copied from interface: Function

Returns the return type and argument types associated with this function.

Specified by:

getSignature in interface Function

simplify

public Node simplify(Arguments arguments)

Description copied from interface: Function

Attempts to find a simplified alternative to applying this function to the specified arguments.

Simplification can occur by replacing expressions with constant values (e.g. replacing (+ 1 1) with 2) or removing redundant branches (e.g. replacing (if (< 2 3) (+ v0 v1) (* v0 v1)) with (+ v0 v1).

Specified by:

simplify in interface Function

Parameters:

arguments - the arguments to be applied to (i.e. evaluated by) this function

Returns:

a simplified version of applying this function to the specified arguments, or null if unable to simplify.

See Also:

NodeSimplifier