to.etc.lexer

Class TextReaderBase

java.lang.Object

to.etc.lexer.TextReaderBase

Direct Known Subclasses:

ReaderScannerBase

public class TextReaderBase
extends Object

A reader which helps with lexical scanning. This contains a variable lookahead text thingy.

Author:

Frits Jalvingh Created on Oct 28, 2009

Constructor Summary

Constructors

Constructor and Description
TextReaderBase(Object source, Reader r)

Method Summary

Modifier and Type	Method and Description
void	accept() Called to advance the character, WITHOUT copying it.
void	accept(int ct) Accept ct characters by skipping over them, they are NOT copied.
protected void	append(char c)
void	append(int c)
void	clearCopy()
void	copy()
void	copy(int count)
String	getCopied()
int	getCurrentColumn()
int	getCurrentLine()
Object	getSource()
int	LA() Returns the "current" character in the queue.
int	LA(int ix) Returns the ixth character for lookahead.
protected StringBuilder	sb()

Methods inherited from class java.lang.Object

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

Constructor Detail

TextReaderBase

public TextReaderBase(Object source,
                      Reader r)

Method Detail

sb

protected StringBuilder sb()

getCopied

public String getCopied()

clearCopy

public void clearCopy()

append

protected void append(char c)

append

public void append(int c)

getSource

public Object getSource()

getCurrentLine

public int getCurrentLine()

getCurrentColumn

public int getCurrentColumn()

LA

public final int LA()
             throws IOException

Returns the "current" character in the queue.

Returns:

Throws:

IOException

LA

public final int LA(int ix)
             throws IOException

Returns the ixth character for lookahead. ix cannot exceed the max queue length.

Parameters:

ix -

Returns:

Throws:

IOException

accept

public void accept()

Called to advance the character, WITHOUT copying it. Consumes the current character, causing the next one to become the current one. Accept increments line numbers and column numbers.

Throws:

IOException

accept

public void accept(int ct)

Accept ct characters by skipping over them, they are NOT copied.

Parameters:

ct -

copy

public void copy()
          throws IOException

Throws:

IOException

copy

public void copy(int count)
          throws IOException

Throws:

IOException