gnu.ecmascript
Class Lexer

java.lang.Object
  java.io.Reader
      gnu.text.Lexer
          gnu.ecmascript.Lexer

All Implemented Interfaces:

java.io.Closeable, java.lang.Readable

public class Lexer
extends Lexer

Reads EcmaScript token from a InPort.

Field Summary

static Char	colonToken
static Char	commaToken
static Char	condToken
static Char	dotToken
static Reserved	elseToken
static java.lang.Object	eofToken
static java.lang.Object	eolToken
static Char	equalToken
static Char	lbraceToken
static Char	lbracketToken
static Char	lparenToken
static Reserved	newToken
static Char	notToken
static Char	rbraceToken
static Char	rbracketToken
static Char	rparenToken
static Char	semicolonToken
static Char	tildeToken

Fields inherited from class gnu.text.Lexer

interactive, nesting, port, tokenBuffer, tokenBufferLength

Fields inherited from class java.io.Reader

lock

Constructor Summary

Lexer(InPort port)

Method Summary

static java.lang.Object	checkReserved(java.lang.String name)
java.lang.String	getIdentifier(int ch)
java.lang.Double	getNumericLiteral(int c)
java.lang.String	getStringLiteral(char quote)
java.lang.Object	getToken() Returns the next token.
static java.lang.Object	getToken(InPort inp)
static void	main(java.lang.String[] args)
java.lang.Object	maybeAssignment(java.lang.Object token)

Methods inherited from class gnu.text.Lexer

checkErrors, checkNext, clearErrors, close, eofError, eofError, error, error, error, fatal, getColumnNumber, getErrors, getLineNumber, getMessages, getName, getPort, isInteractive, mark, peek, popNesting, pushNesting, read, read, readDigitsInBuffer, readOptionalExponent, reset, seenErrors, setInteractive, setMessages, skip_quick, skip, tokenBufferAppend, unread_quick, unread, unread

Methods inherited from class java.io.Reader

mark, markSupported, read, read, ready, skip

Methods inherited from class java.lang.Object

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

Field Detail

lparenToken

public static final Char lparenToken

rparenToken

public static final Char rparenToken

lbraceToken

public static final Char lbraceToken

rbraceToken

public static final Char rbraceToken

lbracketToken

public static final Char lbracketToken

rbracketToken

public static final Char rbracketToken

dotToken

public static final Char dotToken

condToken

public static final Char condToken

commaToken

public static final Char commaToken

colonToken

public static final Char colonToken

equalToken

public static final Char equalToken

tildeToken

public static final Char tildeToken

notToken

public static final Char notToken

semicolonToken

public static final Char semicolonToken

eolToken

public static final java.lang.Object eolToken

eofToken

public static final java.lang.Object eofToken

elseToken

public static final Reserved elseToken

newToken

public static final Reserved newToken

Constructor Detail

Lexer

public Lexer(InPort port)

Method Detail

checkReserved

public static java.lang.Object checkReserved(java.lang.String name)

getNumericLiteral

public java.lang.Double getNumericLiteral(int c)
                                   throws java.io.IOException

Throws:

java.io.IOException

getStringLiteral

public java.lang.String getStringLiteral(char quote)
                                  throws java.io.IOException,
                                         SyntaxException

Throws:

java.io.IOException

SyntaxException

getIdentifier

public java.lang.String getIdentifier(int ch)
                               throws java.io.IOException

Throws:

java.io.IOException

maybeAssignment

public java.lang.Object maybeAssignment(java.lang.Object token)
                                 throws java.io.IOException,
                                        SyntaxException

Throws:

java.io.IOException

SyntaxException

getToken

public java.lang.Object getToken()
                          throws java.io.IOException,
                                 SyntaxException

Returns the next token. Returns:

end-of-file

Sequence.eofValue

end-of-line>dd>eolToken

reserved word

???

identifier>

a java.lang.String

punctuator

???

Literals are returned a QuoteExp objects, Specifically:

numeric literal

a QuoteExp of a java.lang.Double value

boolean literal

a QuoteExp of java.lang.Boolean.TRUE or FALSE

null literal

a QuoteExp whose value is null

string literal

a QuoteExp whose value is a String

Throws:

java.io.IOException

SyntaxException

getToken

public static java.lang.Object getToken(InPort inp)
                                 throws java.io.IOException,
                                        SyntaxException

Throws:

java.io.IOException

SyntaxException

main

public static void main(java.lang.String[] args)