weka.core.mathematicalexpression
Class Parser

java.lang.Object
  java_cup.runtime.lr_parser
      weka.core.mathematicalexpression.Parser

public class Parser
extends java_cup.runtime.lr_parser

CUP v0.11a beta 20060608 generated parser.

Version:

Sun Jan 11 11:41:39 NZDT 2009

Constructor Summary

Parser()
Default constructor.

Parser(java_cup.runtime.Scanner s)
Constructor which sets the default scanner.

Parser(java_cup.runtime.Scanner s, java_cup.runtime.SymbolFactory sf)
Constructor which sets the default scanner.

Method Summary

short[][]	action_table() Access to parse-action table.
java_cup.runtime.Symbol	do_action(int act_num, java_cup.runtime.lr_parser parser, java.util.Stack stack, int top) Invoke a user supplied parse action.
int	EOF_sym() EOF Symbol index.
int	error_sym() error Symbol index.
java.lang.Double	getResult() Returns the result of the evaluation.
java.util.HashMap	getSymbols() Returns the current variable - value relation in use.
static void	main(java.lang.String[] args) Runs the parser from commandline.
short[][]	production_table() Access to production table.
short[][]	reduce_table() Access to reduce_goto table.
void	setResult(java.lang.Double value) Sets the result of the evaluation.
void	setSymbols(java.util.HashMap value) Sets the variable - value relation to use.
int	start_production() Indicates start production.
int	start_state() Indicates start state.

Methods inherited from class java.lang.Object

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

Constructor Detail

Parser

public Parser()

Default constructor.

Parser

public Parser(java_cup.runtime.Scanner s)

Constructor which sets the default scanner.

Parser

public Parser(java_cup.runtime.Scanner s,
              java_cup.runtime.SymbolFactory sf)

Constructor which sets the default scanner.

Method Detail

production_table

public short[][] production_table()

Access to production table.

action_table

public short[][] action_table()

Access to parse-action table.

reduce_table

public short[][] reduce_table()

Access to reduce_goto table.

do_action

public java_cup.runtime.Symbol do_action(int act_num,
                                         java_cup.runtime.lr_parser parser,
                                         java.util.Stack stack,
                                         int top)
                                  throws java.lang.Exception

Invoke a user supplied parse action.

Throws:

java.lang.Exception

start_state

public int start_state()

Indicates start state.

start_production

public int start_production()

Indicates start production.

EOF_sym

public int EOF_sym()

EOF Symbol index.

error_sym

public int error_sym()

error Symbol index.

setSymbols

public void setSymbols(java.util.HashMap value)

Sets the variable - value relation to use.

Parameters:

value - the variable-value relation

getSymbols

public java.util.HashMap getSymbols()

Returns the current variable - value relation in use.

Returns:

the variable-value relation

setResult

public void setResult(java.lang.Double value)

Sets the result of the evaluation.

Parameters:

value - the result

getResult

public java.lang.Double getResult()

Returns the result of the evaluation.

Returns:

the result

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Runs the parser from commandline. Either reads lines from System.in or from a provided file (line by line). With -symbols as first parameter one can provide predefined variable values. E.g.: -symbols "Y=10;X=3" "X+Y"

Parameters:

args - the commandline arguments

Throws:

java.lang.Exception - if something goes wrong