org.extex.ocpware.compiler.left
Class BeginningLeft

java.lang.Object
  org.extex.ocpware.compiler.left.BeginningLeft

All Implemented Interfaces:

Left

public class BeginningLeft
extends java.lang.Object
implements Left

This class represents a reference to the beginning of the sequence.

Version:

$Revision:6007 $

Author:

Gerd Neugebauer

Constructor Summary

BeginningLeft()
Creates a new object.

Method Summary

java.util.List<java.lang.Integer>	genLeft(State state, CompilerState cs) Compile the left item and add the appropriate instructions to the state.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

BeginningLeft

public BeginningLeft()

Creates a new object.

Method Detail

genLeft

public java.util.List<java.lang.Integer> genLeft(State state,
                                                 CompilerState cs)
                                          throws java.io.IOException,
                                                 ArgmentTooBigException

Compile the left item and add the appropriate instructions to the state. As a result a list of indices into the code is returned which should need to be fixed. This fix inserts the position of the code into the places given. Thus it is possible to put destinations for goto statements into the holes.

Specified by:

genLeft in interface Left

Parameters:

state - the current state

cs - the compiler state

Returns:

the list of instructions to fix

Throws:

AliasNotDefinedException - in case that no matching alias is known for a symbolic table reference

java.io.IOException - in case of an I/O error

ArgmentTooBigException - in case that an argument is encountered which does not fit into two bytes

See Also:

Left.genLeft( org.extex.ocpware.compiler.parser.State, CompilerState)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()