public class Parser
extends java_cup.runtime.lr_parser
Constructor and Description |
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Parser()
Default constructor.
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Parser(java_cup.runtime.Scanner s)
Constructor which sets the default scanner.
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Parser(java_cup.runtime.Scanner s,
java_cup.runtime.SymbolFactory sf)
Constructor which sets the default scanner.
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Modifier and Type | Method and Description |
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short[][] |
action_table()
Access to parse-action table.
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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.
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int |
EOF_sym()
EOF Symbol index. |
int |
error_sym()
error Symbol index. |
java.lang.Double |
getResult()
Returns the result of the evaluation.
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java.util.HashMap |
getSymbols()
Returns the current variable - value relation in use.
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static void |
main(java.lang.String[] args)
Runs the parser from commandline.
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short[][] |
production_table()
Access to production table.
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short[][] |
reduce_table()
Access to
reduce_goto table. |
void |
setResult(java.lang.Double value)
Sets the result of the evaluation.
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void |
setSymbols(java.util.HashMap value)
Sets the variable - value relation to use.
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int |
start_production()
Indicates start production.
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int |
start_state()
Indicates start state.
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public Parser()
public Parser(java_cup.runtime.Scanner s)
public Parser(java_cup.runtime.Scanner s, java_cup.runtime.SymbolFactory sf)
public short[][] production_table()
production_table
in class java_cup.runtime.lr_parser
public short[][] action_table()
action_table
in class java_cup.runtime.lr_parser
public short[][] reduce_table()
reduce_goto
table.reduce_table
in class java_cup.runtime.lr_parser
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
do_action
in class java_cup.runtime.lr_parser
java.lang.Exception
public int start_state()
start_state
in class java_cup.runtime.lr_parser
public int start_production()
start_production
in class java_cup.runtime.lr_parser
public int EOF_sym()
EOF
Symbol index.EOF_sym
in class java_cup.runtime.lr_parser
public int error_sym()
error
Symbol index.error_sym
in class java_cup.runtime.lr_parser
public void setSymbols(java.util.HashMap value)
value
- the variable-value relationpublic java.util.HashMap getSymbols()
public void setResult(java.lang.Double value)
value
- the resultpublic java.lang.Double getResult()
public static void main(java.lang.String[] args) throws java.lang.Exception
-symbols
as first parameter one can provide predefined variable values. E.g.:
-symbols "Y=10;X=3" "X+Y"
args
- the commandline argumentsjava.lang.Exception
- if something goes wrong