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:

Mon Apr 26 10:55:03 NZST 2010

Field Summary

Fields inherited from class java_cup.runtime.lr_parser

symbolFactory

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

debug_message, debug_parse, debug_reduce, debug_shift, debug_stack, done_parsing, dump_stack, getScanner, getSymbolFactory, parse, report_error, report_fatal_error, scan, setScanner, syntax_error, unrecovered_syntax_error, user_init

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.

Specified by:

production_table in class java_cup.runtime.lr_parser

action_table

public short[][] action_table()

Access to parse-action table.

Specified by:

action_table in class java_cup.runtime.lr_parser

reduce_table

public short[][] reduce_table()

Access to reduce_goto table.

Specified by:

reduce_table in class java_cup.runtime.lr_parser

do_action

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

Invoke a user supplied parse action.

Specified by:

do_action in class java_cup.runtime.lr_parser

Throws:

Exception

start_state

public int start_state()

Indicates start state.

Specified by:

start_state in class java_cup.runtime.lr_parser

start_production

public int start_production()

Indicates start production.

Specified by:

start_production in class java_cup.runtime.lr_parser

EOF_sym

public int EOF_sym()

EOF Symbol index.

Specified by:

EOF_sym in class java_cup.runtime.lr_parser

error_sym

public int error_sym()

error Symbol index.

Specified by:

error_sym in class java_cup.runtime.lr_parser

setSymbols

public void setSymbols(HashMap value)

Sets the variable - value relation to use.

Parameters:

value - the variable-value relation

getSymbols

public HashMap getSymbols()

Returns the current variable - value relation in use.

Returns:

the variable-value relation

setResult

public void setResult(Double value)

Sets the result of the evaluation.

Parameters:

value - the result

getResult

public Double getResult()

Returns the result of the evaluation.

Returns:

the result

main

public static void main(String[] args)
                 throws 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:

Exception - if something goes wrong