uk.co.cogitolearning.cogpar

Class Token

java.lang.Object

uk.co.cogitolearning.cogpar.Token

public class Token
extends Object

A token that is produced by Tokenizer and fed into Parser.parse A token consists of a token identifier, a string that the token was created from and the position in the input string that the token was found. The token id must be one of a number of pre-defined values

Field Summary

Fields

Modifier and Type	Field and Description
static int	CLOSE_BRACKET Token id for closing brackets
static int	EPSILON Token id for the epsilon terminal
static int	FUNCTION Token id for function names
static int	MULTDIV Token id for multiplication or division
static int	NUMBER Token id for numbers
static int	OPEN_BRACKET Token id for opening brackets
static int	PLUSMINUS Token id for plus or minus
int	pos the position of the token in the input string
static int	RAISED Token id for the exponentiation symbol
String	sequence the string that the token was created from
int	token the token identifier
static int	VARIABLE Token id for variable names

Constructor Summary

Constructors

Constructor and Description
Token(int token, String sequence, int pos) Construct the token with its values

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

EPSILON

public static final int EPSILON

Token id for the epsilon terminal

See Also:

Constant Field Values

PLUSMINUS

public static final int PLUSMINUS

Token id for plus or minus

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Constant Field Values

MULTDIV

public static final int MULTDIV

Token id for multiplication or division

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Constant Field Values

RAISED

public static final int RAISED

Token id for the exponentiation symbol

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Constant Field Values

FUNCTION

public static final int FUNCTION

Token id for function names

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Constant Field Values

OPEN_BRACKET

public static final int OPEN_BRACKET

Token id for opening brackets

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Constant Field Values

CLOSE_BRACKET

public static final int CLOSE_BRACKET

Token id for closing brackets

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Constant Field Values

NUMBER

public static final int NUMBER

Token id for numbers

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Constant Field Values

VARIABLE

public static final int VARIABLE

Token id for variable names

See Also:

Constant Field Values

token

public final int token

the token identifier

sequence

public final String sequence

the string that the token was created from

pos

public final int pos

the position of the token in the input string

Constructor Detail

Token

public Token(int token,
             String sequence,
             int pos)

Construct the token with its values

Parameters:

token - the token identifier

sequence - the string that the token was created from

pos - the position of the token in the input string