lexer
Class Lexer

java.lang.Object
  lexer.Lexer

All Implemented Interfaces:

LexerConstants

public class Lexer
extends java.lang.Object
implements LexerConstants

A class for performing lexical analysis

Field Summary

static Token	jj_nt
static int	MAX_STRING_SIZE Maximum string size allowed
static Token	token
static LexerTokenManager	token_source

Fields inherited from interface lexer.LexerConstants

BOOLEAN_CONST, CLASS, DEFAULT, EOF, ID, INT_CONST, STRING_CONST, tokenImage

Constructor Summary

Lexer(java.io.InputStream stream)

Lexer(java.io.InputStream stream, java.lang.String encoding)

Lexer(LexerTokenManager tm)

Lexer(java.io.Reader stream)

Lexer(java.lang.String[] filenames, boolean debug)
Lexer constructor

Method Summary

static void	disable_tracing()
static void	enable_tracing()
static ParseException	generateParseException()
static java.lang.String	getCurrFilename() Get the filename of the file currently being scanned
static Token	getNextToken()
static Token	getToken(int index)
void	printTokens() Print the tokens (called when using '-sl' command-line option) (note: not the best approach here -- if '-sl' is set then we scan program files twice)
static void	ReInit(java.io.InputStream stream)
static void	ReInit(java.io.InputStream stream, java.lang.String encoding)
void	ReInit(LexerTokenManager tm)
static void	ReInit(java.io.Reader stream)
void	scan() Scan the tokens -- stops if lexical errors found

Methods inherited from class java.lang.Object

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

Field Detail

MAX_STRING_SIZE

public static final int MAX_STRING_SIZE

Maximum string size allowed

See Also:

Constant Field Values

token_source

public static LexerTokenManager token_source

token

public static Token token

jj_nt

public static Token jj_nt

Constructor Detail

Lexer

public Lexer(java.lang.String[] filenames,
             boolean debug)

Lexer constructor

Parameters:

filenames - array of filenames for the source files

debug - flag indicating whether debugging is enabled

Lexer

public Lexer(java.io.InputStream stream)

Lexer

public Lexer(java.io.InputStream stream,
             java.lang.String encoding)

Lexer

public Lexer(java.io.Reader stream)

Lexer

public Lexer(LexerTokenManager tm)

Method Detail

scan

public void scan()
          throws ParseException

Scan the tokens -- stops if lexical errors found

Throws:

ParseException

printTokens

public void printTokens()
                 throws ParseException

Print the tokens (called when using '-sl' command-line option) (note: not the best approach here -- if '-sl' is set then we scan program files twice)

Throws:

ParseException

getCurrFilename

public static java.lang.String getCurrFilename()

Get the filename of the file currently being scanned

ReInit

public static void ReInit(java.io.InputStream stream)

ReInit

public static void ReInit(java.io.InputStream stream,
                          java.lang.String encoding)

ReInit

public static void ReInit(java.io.Reader stream)

ReInit

public void ReInit(LexerTokenManager tm)

getNextToken

public static final Token getNextToken()

getToken

public static final Token getToken(int index)

generateParseException

public static ParseException generateParseException()

enable_tracing

public static final void enable_tracing()

disable_tracing

public static final void disable_tracing()