java_cup.runtime

Class Symbol

java.lang.Object

java_cup.runtime.Symbol

Direct Known Subclasses:

ComplexSymbolFactory.ComplexSymbol

public class Symbol
extends 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

Fields

Modifier and Type	Field and Description
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

Constructors

Constructor and Description
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, Object o) Constructor for l,r values
Symbol(int id, Object o) Constructor for no l,r values
Symbol(int id, Symbol left, Symbol right)
Symbol(int id, Symbol left, Symbol right, Object o)

Method Summary

Modifier and Type	Method and Description
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.

left

public int left

The data passed to parser

right

public int right

The data passed to parser

value

public Object value

Constructor Detail

Symbol

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

Symbol

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

Symbol

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

Constructor for l,r values

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 sym_num)

Constructor for no value or l,r

Method Detail

toString

public String toString()

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

Overrides:

toString in class Object