Class ExpressionRule
- java.lang.Object
-
- com.singularsys.extensions.structure.ExpressionRule
-
- All Implemented Interfaces:
GrammaticalRuleI
,GrammarMatcher
,java.io.Serializable
public class ExpressionRule extends java.lang.Object implements GrammaticalRuleI
Parses an expression. Calls theShuntingYard.parseSubExpression()
- Author:
- Richard Morris
- See Also:
- Serialized Form
-
-
Constructor Summary
Constructors Constructor Description ExpressionRule()
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
init(Jep jep)
Delayed initialisation, this methods is called whenever components of the jep instance are changed.Node
match(Lookahead2Iterator<Token> it, GrammarParser parser)
-
-
-
Method Detail
-
match
public Node match(Lookahead2Iterator<Token> it, GrammarParser parser) throws ParseException
- Specified by:
match
in interfaceGrammarMatcher
- Specified by:
match
in interfaceGrammaticalRuleI
- Parameters:
it
- iterator with tokens to parseparser
- the parser to parse any components of the rule- Returns:
- successful parses should return a Node, null if unsuccessful
- Throws:
ParseException
- if there is a syntactical error
-
init
public void init(Jep jep)
Description copied from interface:GrammarMatcher
Delayed initialisation, this methods is called whenever components of the jep instance are changed.- Specified by:
init
in interfaceGrammarMatcher
- Parameters:
jep
- the current jep instance.
-
-