java_cup.runtime

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

Constructor Summary

Symbol(int sym_num)
Constructor for no value or l,r
Symbol(int id, Object o)
Constructor for no l,r values
Symbol(int id, int l, int r)
Constructor for no value
Symbol(int id, int l, int r, Object o)
Constructor for l,r values

Method Summary

String
toString()
Printing this token out.

Field Details

left

public int left
The data passed to parser


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.


right

public int right
The data passed to parser


sym

public int sym
The symbol number of the terminal or non terminal being represented


value

public Object value

Constructor Details

Symbol

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


Symbol

public Symbol(int id,
              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 id,
              int l,
              int r,
              Object o)
Constructor for l,r values

Method Details

toString

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