Package weka.core.mathematicalexpression

Class 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

    • Field Summary

      • Fields inherited from class java_cup.runtime.lr_parser

        symbolFactory

    • Constructor Summary

      Constructors 
      Constructor Description
      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

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      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_cup.runtime.lr_parser

        debug_message, debug_parse, debug_reduce, debug_shift, debug_stack, done_parsing, dump_stack, expected_token_ids, getScanner, getSymbolContainer, getSymbolFactory, parse, report_error, report_fatal_error, scan, setScanner, symbl_name_from_id, 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,
                                         java.util.Stack stack,
                                         int top)
                                  throws java.lang.Exception
        Invoke a user supplied parse action.
        Specified by:
        do_action in class java_cup.runtime.lr_parser
        Throws:
        java.lang.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​(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