org.acplt.oncrpc.apps.jrpcgen.cup_runtime

Class Symbol

java.lang.Object

org.acplt.oncrpc.apps.jrpcgen.cup_runtime.Symbol

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

Method Summary

Modifier and Type	Method and Description
String	toString()

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,
              int l,
              int r,
              Object o)

Parameters:

id - Id of the symbol type

l - Left position of the symbol in the original input file

r - Right position of the symbol in the original input file

o - Lexical value of the symbol

Symbol

public Symbol(int id,
              Object o)

Parameters:

id - Id of the symbol type

o - Lexical value of the symbol

Symbol

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

Parameters:

id - Id of the symbool type

l - Left position of the symbol in the original input file

r - Right position of the symbol in the original input file

Symbol

public Symbol(int sym_num)

Parameters:

sym_num - Number (aka Id) of the symbol type

Method Detail

toString

public String toString()

Overrides:

toString in class Object

Returns:

The string representation of the symbol.