org.nfunk.jep

Class Parser

java.lang.Object

org.nfunk.jep.Parser

All Implemented Interfaces:

ParserConstants, ParserTreeConstants

public class Parser
extends Object
implements ParserTreeConstants, ParserConstants

Field Summary

Fields

Modifier and Type	Field and Description
Token	jj_nt
protected org.nfunk.jep.JJTParserState	jjtree
boolean	lookingAhead
Token	token
ParserTokenManager	token_source

Fields inherited from interface org.nfunk.jep.ParserTreeConstants

JJTCONSTANT, JJTFUNNODE, jjtNodeName, JJTSTART, JJTVARNODE, JJTVOID

Fields inherited from interface org.nfunk.jep.ParserConstants

AND, ASSIGN, COLON, COMMA, CROSS, DECIMAL_LITERAL, DEFAULT, DIGIT1, DIGIT2, DIV, DOT, EOF, EQ, EXPONENT, FLOATING_POINT_LITERAL, GE, GT, INDENTIFIER1, INDENTIFIER2, INTEGER_LITERAL, LE, LETTER1, LETTER2, LRND, LSQ, LT, MINUS, MOD, MUL, NE, NO_DOT_IN_IDENTIFIERS, NOT, OR, PLUS, POWER, RRND, RSQ, SEMI, STRING_LITERAL, tokenImage

Constructor Summary

Constructors

Constructor and Description
Parser(InputStream stream)
Parser(ParserTokenManager tm)
Parser(Reader stream)

Method Summary

Modifier and Type	Method and Description
void	AdditiveExpression()
void	AndExpression()
void	AnyConstant()
void	ArgumentList(int reqArguments, String functionName)
void	ArrayAccess()
void	AssignExpression()
Node	continueParse() Continue parsing without re-initilising stream.
void	disable_tracing()
void	enable_tracing()
void	EqualExpression()
void	Expression()
void	Function()
ParseException	generateParseException()
Token	getNextToken()
Token	getToken(int index)
String	Identifier()
void	ListExpression()
void	LValue()
void	MultiplicativeExpression()
void	OrExpression()
Node	parseStream(Reader stream, JEP jep_in)
void	PowerExpression()
Object	RealConstant()
void	ReInit(InputStream stream)
void	ReInit(ParserTokenManager tm)
void	ReInit(Reader stream)
void	RelationalExpression()
void	restart(Reader stream, JEP jep_in) Restart the parse with the given stream.
void	RightExpression()
void	setInitialTokenManagerState(int state) Sets the initial state that the token manager is in.
ASTStart	Start() GRAMMAR START
void	UnaryExpression()
void	UnaryExpressionNotPlusMinus()
void	Variable()

Methods inherited from class java.lang.Object

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

Field Detail

jjtree

protected org.nfunk.jep.JJTParserState jjtree

token_source

public ParserTokenManager token_source

token

public Token token

jj_nt

public Token jj_nt

lookingAhead

public boolean lookingAhead

Constructor Detail

Parser

public Parser(InputStream stream)

Parser

public Parser(Reader stream)

Parser

public Parser(ParserTokenManager tm)

Method Detail

parseStream

public Node parseStream(Reader stream,
                        JEP jep_in)
                 throws ParseException

Throws:

ParseException

restart

public void restart(Reader stream,
                    JEP jep_in)

Restart the parse with the given stream.

Since:

2.3.0 beta 1

continueParse

public Node continueParse()
                   throws ParseException

Continue parsing without re-initilising stream. Allows renetrancy of parser so that strings like "x=1; y=2; z=3;" can be parsed. When a semi colon is encountered parsing finishes leaving the rest of the string unparsed. Parsing can be resumed from the current position by using this method. For example

 XJep j = new XJep();
 Parser parse = j.getParse();
 StringReader sr = new StringReader("x=1; y=2; z=3;");
 parse.restart(sr,j);
 Node node;
 try {
 while((node = j.continueParse())!=null) {
    j.println(node);
 } }catch(ParseException e) {}
 

Throws:

ParseException

setInitialTokenManagerState

public void setInitialTokenManagerState(int state)

Sets the initial state that the token manager is in. Can be used to change how x.x is interpreted, either as a single identifier (DEFAULT) or as x <DOT> x (NO_DOT_IN_IDENTIFIERS)

Parameters:

state - the state to be in. Currently the only legal values are DEFAULT and NO_DOT_IN_IDENTIFIER

Start

public final ASTStart Start()
                     throws ParseException

GRAMMAR START

Throws:

ParseException

Expression

public final void Expression()
                      throws ParseException

Throws:

ParseException

AssignExpression

public final void AssignExpression()
                            throws ParseException

Throws:

ParseException

RightExpression

public final void RightExpression()
                           throws ParseException

Throws:

ParseException

OrExpression

public final void OrExpression()
                        throws ParseException

Throws:

ParseException

AndExpression

public final void AndExpression()
                         throws ParseException

Throws:

ParseException

EqualExpression

public final void EqualExpression()
                           throws ParseException

Throws:

ParseException

RelationalExpression

public final void RelationalExpression()
                                throws ParseException

Throws:

ParseException

AdditiveExpression

public final void AdditiveExpression()
                              throws ParseException

Throws:

ParseException

MultiplicativeExpression

public final void MultiplicativeExpression()
                                    throws ParseException

Throws:

ParseException

UnaryExpression

public final void UnaryExpression()
                           throws ParseException

Throws:

ParseException

PowerExpression

public final void PowerExpression()
                           throws ParseException

Throws:

ParseException

UnaryExpressionNotPlusMinus

public final void UnaryExpressionNotPlusMinus()
                                       throws ParseException

Throws:

ParseException

ListExpression

public final void ListExpression()
                          throws ParseException

Throws:

ParseException

LValue

public final void LValue()
                  throws ParseException

Throws:

ParseException

ArrayAccess

public final void ArrayAccess()
                       throws ParseException

Throws:

ParseException

Variable

public final void Variable()
                    throws ParseException

Throws:

ParseException

Function

public final void Function()
                    throws ParseException

Throws:

ParseException

ArgumentList

public final void ArgumentList(int reqArguments,
                               String functionName)
                        throws ParseException

Throws:

ParseException

Identifier

public final String Identifier()
                        throws ParseException

Throws:

ParseException

AnyConstant

public final void AnyConstant()
                       throws ParseException

Throws:

ParseException

RealConstant

public final Object RealConstant()
                          throws ParseException

Throws:

ParseException

ReInit

public void ReInit(InputStream stream)

ReInit

public void ReInit(Reader stream)

ReInit

public void ReInit(ParserTokenManager tm)

getNextToken

public final Token getNextToken()

getToken

public final Token getToken(int index)

generateParseException

public ParseException generateParseException()

enable_tracing

public final void enable_tracing()

disable_tracing

public final void disable_tracing()