org.hecl.java

Class NullCmd

java.lang.Object

org.hecl.java.NullCmd

All Implemented Interfaces:

Command

public class NullCmd
extends java.lang.Object
implements Command

The NullCmd class implements the "null" command, returning an ObjectThing containing 'null'.

Constructor Summary

Constructors

Constructor and Description
NullCmd()

Method Summary

Modifier and Type	Method and Description
Thing	cmdCode(Interp interp, Thing[] argv) The cmdCode method takes an interpreter and an array of Things, performs some calculations, and returns a Thing representing the computed value, or null.
static void	load(Interp interp)
static void	unload(Interp interp)

Methods inherited from class java.lang.Object

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

Constructor Detail

NullCmd

public NullCmd()

Method Detail

cmdCode

public Thing cmdCode(Interp interp,
                     Thing[] argv)
              throws HeclException

Description copied from interface: Command

The cmdCode method takes an interpreter and an array of Things, performs some calculations, and returns a Thing representing the computed value, or null.

Specified by:

cmdCode in interface Command

Parameters:

interp - an Interp value

argv - a Thing[] value

Returns:

A Thing representing the computed value, or null.

Throws:

HeclException - if an error occurs

load

public static void load(Interp interp)
                 throws HeclException

Throws:

HeclException

unload

public static void unload(Interp interp)