Package 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
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Field Summary
Fields inherited from class java_cup.runtime.lr_parser
symbolFactory
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionshort[][]
Access to parse-action table.java_cup.runtime.Symbol
Invoke a user supplied parse action.int
EOF_sym()
EOF
Symbol index.int
error
Symbol index.Returns the result of the evaluation.Returns the current variable - value relation in use.static void
Runs the parser from commandline.short[][]
Access to production table.short[][]
Access toreduce_goto
table.void
Sets the result of the evaluation.void
setSymbols
(HashMap value) Sets the variable - value relation to use.int
Indicates start production.int
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
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Constructor Details
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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.
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Method Details
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production_table
public short[][] production_table()Access to production table.- Specified by:
production_table
in classjava_cup.runtime.lr_parser
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action_table
public short[][] action_table()Access to parse-action table.- Specified by:
action_table
in classjava_cup.runtime.lr_parser
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reduce_table
public short[][] reduce_table()Access toreduce_goto
table.- Specified by:
reduce_table
in classjava_cup.runtime.lr_parser
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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 classjava_cup.runtime.lr_parser
- Throws:
Exception
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start_state
public int start_state()Indicates start state.- Specified by:
start_state
in classjava_cup.runtime.lr_parser
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start_production
public int start_production()Indicates start production.- Specified by:
start_production
in classjava_cup.runtime.lr_parser
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EOF_sym
public int EOF_sym()EOF
Symbol index.- Specified by:
EOF_sym
in classjava_cup.runtime.lr_parser
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error_sym
public int error_sym()error
Symbol index.- Specified by:
error_sym
in classjava_cup.runtime.lr_parser
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setSymbols
Sets the variable - value relation to use.- Parameters:
value
- the variable-value relation
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getSymbols
Returns the current variable - value relation in use.- Returns:
- the variable-value relation
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setResult
Sets the result of the evaluation.- Parameters:
value
- the result
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getResult
Returns the result of the evaluation.- Returns:
- the result
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main
Runs the parser from commandline. Either reads lines from System.in or from a provided file (line by line). With-symbols <semi-colon separated list of variable/value pairs>
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
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