Class JavaWhileRule
- java.lang.Object
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- com.singularsys.extensions.structure.JavaWhileRule
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- All Implemented Interfaces:
GrammaticalRuleI
,GrammarMatcher
,java.io.Serializable
public class JavaWhileRule extends java.lang.Object implements GrammaticalRuleI
Parse a Java-style while loopwhile(x<10) x=x+1;
<JavaWhileRule> ::= <while> <open> <expression> <close> <statement>
A successful parse will return aLoopNode
.- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description JavaWhileRule(SymbolToken whileToken, SymbolToken open, GrammaticalRuleI expression, SymbolToken close, GrammaticalRuleI statement)
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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)
Attempt to parse the input using the rule
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Constructor Detail
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JavaWhileRule
public JavaWhileRule(SymbolToken whileToken, SymbolToken open, GrammaticalRuleI expression, SymbolToken close, GrammaticalRuleI statement)
- Parameters:
whileToken
- token for the while symbolopen
- opening bracketexpression
- rule to parse an expressionclose
- closing bracketstatement
- rule to parse an statement
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Method Detail
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match
public Node match(Lookahead2Iterator<Token> it, GrammarParser parser) throws ParseException
Description copied from interface:GrammaticalRuleI
Attempt to parse the input using the rule- 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
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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.
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