java_cup.runtime
Class Symbol

java.lang.Object
  java_cup.runtime.Symbol

public class Symbol
extends java.lang.Object

Defines the Symbol class, which is used to represent all terminals and nonterminals while parsing. The lexer should pass CUP Symbols and CUP returns a Symbol.

Version:

last updated: 7/3/96

Author:

Frank Flannery

Field Summary

int	left
int	parse_state The parse state to be recorded on the parse stack with this symbol.
Pos	pos The data passed to parser
int	right
int	sym The symbol number of the terminal or non terminal being represented
java.lang.Object	value

Constructor Summary

Symbol(int sym_num)
Constructor for no value or l,r

Symbol(int id, int l, int r)
Constructor for no value

Symbol(int id, int l, int r, java.lang.Object o)
Constructor for l,r values

Symbol(int id, Pos pos, java.lang.Object o)
Constructor for no l,r values

Symbol(int id, Symbol left, Symbol right)

Symbol(int id, Symbol left, Symbol right, java.lang.Object o)

Method Summary

java.lang.String

toString() Printing this token out.

Methods inherited from class java.lang.Object

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

Field Detail

sym

public int sym

The symbol number of the terminal or non terminal being represented

parse_state

public int parse_state

The parse state to be recorded on the parse stack with this symbol. This field is for the convenience of the parser and shouldn't be modified except by the parser.

pos

public Pos pos

The data passed to parser

left

public int left

right

public int right

value

public java.lang.Object value

Constructor Detail

Symbol

public Symbol(int id,
              Symbol left,
              Symbol right,
              java.lang.Object o)

Symbol

public Symbol(int id,
              Symbol left,
              Symbol right)

Symbol

public Symbol(int id,
              int l,
              int r,
              java.lang.Object o)

Constructor for l,r values

Symbol

public Symbol(int id,
              Pos pos,
              java.lang.Object o)

Constructor for no l,r values

Symbol

public Symbol(int id,
              int l,
              int r)

Constructor for no value

Symbol

public Symbol(int sym_num)

Constructor for no value or l,r

Method Detail

toString

public java.lang.String toString()

Printing this token out. (Override for pretty-print).

Overrides:

toString in class java.lang.Object